Podcast
Questions and Answers
What would you suggest as a remedy for acidity after overeating?
What would you suggest as a remedy for acidity after overeating?
Baking soda solution.
What is the taste of acids and what color do they turn blue litmus paper?
What is the taste of acids and what color do they turn blue litmus paper?
Acids are sour in taste and turn blue litmus paper red.
What taste is associated with bases and what color do they turn red litmus paper?
What taste is associated with bases and what color do they turn red litmus paper?
Bases are bitter and turn red litmus paper blue.
What happens to a curry stain on a cloth when scrubbed with soap?
What happens to a curry stain on a cloth when scrubbed with soap?
What color is litmus solution when it is neutral?
What color is litmus solution when it is neutral?
Name a natural indicator that can show the presence of acid or base.
Name a natural indicator that can show the presence of acid or base.
What is the role of indicators like phenolphthalein?
What is the role of indicators like phenolphthalein?
What is an example of a synthetic indicator?
What is an example of a synthetic indicator?
What is the scientific classification of litmus?
What is the scientific classification of litmus?
What happens when turmeric indicator is used in a basic solution?
What happens when turmeric indicator is used in a basic solution?
What property of acids and bases do we use to neutralize their effects?
What property of acids and bases do we use to neutralize their effects?
Besides litmus, what is another natural indicator?
Besides litmus, what is another natural indicator?
What color does a curry stain turn when soap is applied and why
What color does a curry stain turn when soap is applied and why
What division of plants does litmus come from?
What division of plants does litmus come from?
When a litmus solution is purple, what is its pH?
When a litmus solution is purple, what is its pH?
Give an example of a flower with colored petals that can act as an acid-base indicator.
Give an example of a flower with colored petals that can act as an acid-base indicator.
What are acid-base indicators sometimes called?
What are acid-base indicators sometimes called?
If a solution turns red litmus to blue, is the solution acid or base?
If a solution turns red litmus to blue, is the solution acid or base?
When soap is washed off a curry stain, what color does the stain return to?
When soap is washed off a curry stain, what color does the stain return to?
Name one natural source of acid-base indicators besides litmus.
Name one natural source of acid-base indicators besides litmus.
How does the color change of a curry stain on a white cloth demonstrate the nature of soap and water?
How does the color change of a curry stain on a white cloth demonstrate the nature of soap and water?
Considering the color change of litmus, can a solution that appears blue to the eye using litmus paper be definitively categorized as basic?
Considering the color change of litmus, can a solution that appears blue to the eye using litmus paper be definitively categorized as basic?
If a substance does not change the colors of either red or blue litmus paper, how does this indicate its placement on the pH scale?
If a substance does not change the colors of either red or blue litmus paper, how does this indicate its placement on the pH scale?
Why might synthetic indicators be preferred over litmus in certain laboratory settings?
Why might synthetic indicators be preferred over litmus in certain laboratory settings?
How might you use red cabbage juice at home to test if your homemade cleaning solution is acidic or basic?
How might you use red cabbage juice at home to test if your homemade cleaning solution is acidic or basic?
How could one confirm the effectiveness of a baking soda solution in neutralizing excess stomach acid without tasting the solution?
How could one confirm the effectiveness of a baking soda solution in neutralizing excess stomach acid without tasting the solution?
If a solution turns a turmeric indicator from yellow to red-brown, what does this indicate about the solution?
If a solution turns a turmeric indicator from yellow to red-brown, what does this indicate about the solution?
How can acid-base indicators be used to determine the endpoint of a titration reaction?
How can acid-base indicators be used to determine the endpoint of a titration reaction?
Besides using litmus paper, describe an easily available natural method to differentiate between a basic and neutral solution.
Besides using litmus paper, describe an easily available natural method to differentiate between a basic and neutral solution.
Why is the natural origin of litmus important for understanding its chemical behavior as an indicator?
Why is the natural origin of litmus important for understanding its chemical behavior as an indicator?
What is the purpose of using indicators in chemistry?
What is the purpose of using indicators in chemistry?
What type of indicator is used in Activity 2.2?
What type of indicator is used in Activity 2.2?
If red litmus paper turns blue, what does this indicate about the solution?
If red litmus paper turns blue, what does this indicate about the solution?
Name one acid mentioned in the text.
Name one acid mentioned in the text.
What is the result of putting an acid on a piece of onion-treated cloth?
What is the result of putting an acid on a piece of onion-treated cloth?
What characteristic of some substances is used to test for acids and bases using olfactory indicators?
What characteristic of some substances is used to test for acids and bases using olfactory indicators?
What does phenolphthalein indicator show when it comes into contact with basic solutions?
What does phenolphthalein indicator show when it comes into contact with basic solutions?
What is the purpose of leaving the chopped onions with cloth strips overnight?
What is the purpose of leaving the chopped onions with cloth strips overnight?
Besides red and blue litmus, name another indicator mentioned in the text.
Besides red and blue litmus, name another indicator mentioned in the text.
In the experiment described, why is it important to use a watch glass when testing solutions with indicators?
In the experiment described, why is it important to use a watch glass when testing solutions with indicators?
What is the purpose of using a cloth strip treated with onion to test for acids and bases?
What is the purpose of using a cloth strip treated with onion to test for acids and bases?
Describe the expected color change of red litmus paper when placed in a solution of hydrochloric acid (HCl).
Describe the expected color change of red litmus paper when placed in a solution of hydrochloric acid (HCl).
How does the color change of red litmus paper indicate the presence of a base?
How does the color change of red litmus paper indicate the presence of a base?
Why are indicators important in chemistry?
Why are indicators important in chemistry?
Based on the experiment, what would you expect to observe when you test a solution of sodium hydroxide (NaOH) with phenolphthalein?
Based on the experiment, what would you expect to observe when you test a solution of sodium hydroxide (NaOH) with phenolphthalein?
What is the key difference between an indicator and an olfactory indicator?
What is the key difference between an indicator and an olfactory indicator?
If you observe that red litmus paper turns blue when placed in a solution, how would you classify the solution?
If you observe that red litmus paper turns blue when placed in a solution, how would you classify the solution?
What would you expect to happen to a piece of onion-treated cloth when dipped into a solution of acetic acid?
What would you expect to happen to a piece of onion-treated cloth when dipped into a solution of acetic acid?
Why is it important to leave the chopped onions in a plastic bag with the cloth strips overnight?
Why is it important to leave the chopped onions in a plastic bag with the cloth strips overnight?
Why is it necessary to use different indicators to identify a solution as an acid or a base, instead of relying only on red litmus paper?
Why is it necessary to use different indicators to identify a solution as an acid or a base, instead of relying only on red litmus paper?
In Activity 2.1, why are multiple acids and bases tested with each indicator instead of just one of each?
In Activity 2.1, why are multiple acids and bases tested with each indicator instead of just one of each?
If the cloth strips from Activity 2.2 do not have an onion smell before testing, will they still function as olfactory indicators? Why or why not?
If the cloth strips from Activity 2.2 do not have an onion smell before testing, will they still function as olfactory indicators? Why or why not?
Considering the results of Activity 2.1, what specific observation would lead you to conclude a substance is a strong base, given the use of a variety of indicators?
Considering the results of Activity 2.1, what specific observation would lead you to conclude a substance is a strong base, given the use of a variety of indicators?
How does the overnight refrigeration step in preparing onion-treated cloth influence the effectiveness of the olfactory indicator?
How does the overnight refrigeration step in preparing onion-treated cloth influence the effectiveness of the olfactory indicator?
What would be a limitation of using only olfactory indicators to test for acids and bases, unlike using visual indicators such as litmus?
What would be a limitation of using only olfactory indicators to test for acids and bases, unlike using visual indicators such as litmus?
Why is it important to use a clean cloth in Activity 2.2 when preparing olfactory indicators?
Why is it important to use a clean cloth in Activity 2.2 when preparing olfactory indicators?
If a solution tested with methyl orange indicator gives a yellow color, what would this indicate about the nature of the solution, and why?
If a solution tested with methyl orange indicator gives a yellow color, what would this indicate about the nature of the solution, and why?
Based on the provided information, why might laboratory settings use both olfactory and visual indicators to identify unknown solutions?
Based on the provided information, why might laboratory settings use both olfactory and visual indicators to identify unknown solutions?
In 'Activity 2.1', if a solution does not change the color of red litmus paper, would it be correct to conclude that it's neutral, or could it be something else? Explain.
In 'Activity 2.1', if a solution does not change the color of red litmus paper, would it be correct to conclude that it's neutral, or could it be something else? Explain.
If a solution causes no color change in red litmus paper and a blue litmus paper when tested, what specific type of solution could it be?
If a solution causes no color change in red litmus paper and a blue litmus paper when tested, what specific type of solution could it be?
What sensory property of olfactory indicators is relevant in identifying acidic or basic mediums?
What sensory property of olfactory indicators is relevant in identifying acidic or basic mediums?
In Activity 2.2, what specific treatment is applied to the cloth strips to enable them to function as olfactory indicators?
In Activity 2.2, what specific treatment is applied to the cloth strips to enable them to function as olfactory indicators?
The text describes a method to differentiate a basic, neutral, and acidic solution. What is the minimum number of trials that must be conducted to guarantee that those 3 have been differentiated using only red litmus paper?
The text describes a method to differentiate a basic, neutral, and acidic solution. What is the minimum number of trials that must be conducted to guarantee that those 3 have been differentiated using only red litmus paper?
Why is it necessary to leave the onion and cloth mixture overnight in a refrigerator?
Why is it necessary to leave the onion and cloth mixture overnight in a refrigerator?
Other than color changes, what other observable characteristic change helps identify acids and bases using an olfactory indicator like onion?
Other than color changes, what other observable characteristic change helps identify acids and bases using an olfactory indicator like onion?
In the absence of phenolphthalein, if a solution turns red litmus paper blue and also causes an odor change on onion-treated cloth, would it classify as basic or acidic?
In the absence of phenolphthalein, if a solution turns red litmus paper blue and also causes an odor change on onion-treated cloth, would it classify as basic or acidic?
If a solution is tested with red litmus paper and no change is observed and then it is tested with blue litmus paper where no color change is observed, what kind of substance is being tested?
If a solution is tested with red litmus paper and no change is observed and then it is tested with blue litmus paper where no color change is observed, what kind of substance is being tested?
If you are only provided with red litmus paper, and you observe the paper turns blue, what does that indicate about the substance being tested?
If you are only provided with red litmus paper, and you observe the paper turns blue, what does that indicate about the substance being tested?
In the described activity, how does the preparation of the cloth strips differ for use as an olfactory indicator compared to red or blue litmus paper indicator?
In the described activity, how does the preparation of the cloth strips differ for use as an olfactory indicator compared to red or blue litmus paper indicator?
What observations can you make about the odour of vanilla essence and clove oil when tested with dilute HCl and NaOH?
What observations can you make about the odour of vanilla essence and clove oil when tested with dilute HCl and NaOH?
What gas is produced when zinc granules react with dilute sulphuric acid?
What gas is produced when zinc granules react with dilute sulphuric acid?
What happens when a burning candle is brought near a gas-filled bubble from the reaction of zinc and acid?
What happens when a burning candle is brought near a gas-filled bubble from the reaction of zinc and acid?
How does the mixture of dilute vanilla essence with acids and bases help in identifying them?
How does the mixture of dilute vanilla essence with acids and bases help in identifying them?
What effect does shaking dilute NaOH with clove oil have on its odour?
What effect does shaking dilute NaOH with clove oil have on its odour?
What observation is expected when testing different acids like HCl and HNO3 with zinc granules?
What observation is expected when testing different acids like HCl and HNO3 with zinc granules?
Why is the caution needed when performing experiments with acids and metals?
Why is the caution needed when performing experiments with acids and metals?
What is the role of soap solution in the experiment with hydrogen gas?
What is the role of soap solution in the experiment with hydrogen gas?
What can be inferred about the use of natural substances like vanilla and clove as indicators?
What can be inferred about the use of natural substances like vanilla and clove as indicators?
Why is it important to record changes in odour during the acid-base tests?
Why is it important to record changes in odour during the acid-base tests?
In the experiment with vanilla essence and clove oil, what is the purpose of using dilute HCl and dilute NaOH solutions?
In the experiment with vanilla essence and clove oil, what is the purpose of using dilute HCl and dilute NaOH solutions?
Besides vanilla and clove, what other substance is mentioned as being tested as a possible olfactory indicator?
Besides vanilla and clove, what other substance is mentioned as being tested as a possible olfactory indicator?
In Activity 2.3, what is observed on the surface of the zinc granules when dilute sulphuric acid is added?
In Activity 2.3, what is observed on the surface of the zinc granules when dilute sulphuric acid is added?
What happens when a burning candle is brought near a gas-filled bubble in the soap solution in Activity 2.3?
What happens when a burning candle is brought near a gas-filled bubble in the soap solution in Activity 2.3?
In Activity 2.3, what is the purpose of passing the gas produced through soap solution?
In Activity 2.3, what is the purpose of passing the gas produced through soap solution?
Are the observations in Activity 2.3 the same for all the acids tested, i.e. HCl, HNO3 and CH3COOH?
Are the observations in Activity 2.3 the same for all the acids tested, i.e. HCl, HNO3 and CH3COOH?
What is the next step, after rinsing, when testing the odor of cloth strips treated with onion?
What is the next step, after rinsing, when testing the odor of cloth strips treated with onion?
Based on the activities described, which of the substances, vanilla, onion or clove, can serve as olfactory indicators?
Based on the activities described, which of the substances, vanilla, onion or clove, can serve as olfactory indicators?
What is the purpose of doing activity 2.3 with different acids, other than sulphuric acid?
What is the purpose of doing activity 2.3 with different acids, other than sulphuric acid?
What is the role of vanilla essence and clove oil in the experiment with acids and bases?
What is the role of vanilla essence and clove oil in the experiment with acids and bases?
Describe what occurs when zinc granules react with dilute sulphuric acid.
Describe what occurs when zinc granules react with dilute sulphuric acid.
What do the bubbles formed in soap solution indicate in the experiment with zinc and dilute acid?
What do the bubbles formed in soap solution indicate in the experiment with zinc and dilute acid?
How can the change in odour of substances like vanilla essence and clove oil indicate the presence of an acid or base?
How can the change in odour of substances like vanilla essence and clove oil indicate the presence of an acid or base?
What is the importance of conducting the described activities under a teacher's supervision?
What is the importance of conducting the described activities under a teacher's supervision?
What would you expect to observe if you test clove oil with dilute HCl and NaOH?
What would you expect to observe if you test clove oil with dilute HCl and NaOH?
In the conducted experiment, why is it necessary to record changes in odour when testing with indicators?
In the conducted experiment, why is it necessary to record changes in odour when testing with indicators?
Compare the observations made with dilute NaOH and HCl while testing substances like clove oil.
Compare the observations made with dilute NaOH and HCl while testing substances like clove oil.
Why might zinc granules be reacted with different acids like HCl, HNO3, and CH3COOH in experiments?
Why might zinc granules be reacted with different acids like HCl, HNO3, and CH3COOH in experiments?
What significance do the observations from the acid-base experiments have for understanding chemical properties?
What significance do the observations from the acid-base experiments have for understanding chemical properties?
How can one determine the effect of an acid or base on the odor of vanilla essence, based on the described procedure?
How can one determine the effect of an acid or base on the odor of vanilla essence, based on the described procedure?
Using the experimental setup, what gas is produced from the reaction of a metal with dilute sulfuric acid?
Using the experimental setup, what gas is produced from the reaction of a metal with dilute sulfuric acid?
Why is it essential to pass the gas through a soap solution before igniting it in the 'Activity 2.3'?
Why is it essential to pass the gas through a soap solution before igniting it in the 'Activity 2.3'?
What observation specifically indicates the presence of hydrogen gas when a burning candle is brought near a gas-filled bubble?
What observation specifically indicates the presence of hydrogen gas when a burning candle is brought near a gas-filled bubble?
Based on 'Activity 2.3', would you expect the reaction of all acids with metals to produce the same gas?
Based on 'Activity 2.3', would you expect the reaction of all acids with metals to produce the same gas?
In the context of the experiment, what does the formation of bubbles in soap solution imply when a metal reacts with an acid?
In the context of the experiment, what does the formation of bubbles in soap solution imply when a metal reacts with an acid?
What is the role of clove oil in the activity involving olfactory indicators?
What is the role of clove oil in the activity involving olfactory indicators?
Why is it important to note odor changes after subjecting vanilla and clove oil to both dilute $HCl$ and $NaOH$ solution, rather than just one?
Why is it important to note odor changes after subjecting vanilla and clove oil to both dilute $HCl$ and $NaOH$ solution, rather than just one?
Based on the passage, what common chemical property of acids is demonstrated by the reaction of zinc with sulfuric acid?
Based on the passage, what common chemical property of acids is demonstrated by the reaction of zinc with sulfuric acid?
In the context of the experiments described, how does the behavior of the olfactory indicators differ from the color-change indicators like litmus?
In the context of the experiments described, how does the behavior of the olfactory indicators differ from the color-change indicators like litmus?
What gas is produced when a metal reacts with an acid?
What gas is produced when a metal reacts with an acid?
What compound is formed, other than hydrogen gas, when a metal reacts with an acid?
What compound is formed, other than hydrogen gas, when a metal reacts with an acid?
What are the products of the reaction between sodium hydroxide and zinc metal?
What are the products of the reaction between sodium hydroxide and zinc metal?
Is the reaction of all metals with sodium hydroxide possible? Yes or No.
Is the reaction of all metals with sodium hydroxide possible? Yes or No.
What is the chemical formula for sodium carbonate?
What is the chemical formula for sodium carbonate?
What is the chemical formula for sodium hydrogen carbonate?
What is the chemical formula for sodium hydrogen carbonate?
What gas is produced when metal carbonates and metal hydrogen carbonates react with acids?
What gas is produced when metal carbonates and metal hydrogen carbonates react with acids?
What is the chemical formula for lime water?
What is the chemical formula for lime water?
What are the two reactants used in Activity 2.5?
What are the two reactants used in Activity 2.5?
What is one of the observable results of passing carbon dioxide gas through lime water?
What is one of the observable results of passing carbon dioxide gas through lime water?
Explain the process of how a metal reacts with an acid. Include a general chemical equation to represent the reaction type.
Explain the process of how a metal reacts with an acid. Include a general chemical equation to represent the reaction type.
Describe the reaction that takes place when granulated zinc metal is added to a sodium hydroxide solution. Include the chemical equation.
Describe the reaction that takes place when granulated zinc metal is added to a sodium hydroxide solution. Include the chemical equation.
What would you expect to observe when sodium carbonate (Na2CO3) is added to a dilute hydrochloric acid solution? Explain your reasoning.
What would you expect to observe when sodium carbonate (Na2CO3) is added to a dilute hydrochloric acid solution? Explain your reasoning.
What do you expect to observe when sodium hydrogencarbonate (NaHCO3) is added to dilute hydrochloric acid? Explain the observation.
What do you expect to observe when sodium hydrogencarbonate (NaHCO3) is added to dilute hydrochloric acid? Explain the observation.
What is the purpose of passing the gas produced in Activity 2.5 through lime water?
What is the purpose of passing the gas produced in Activity 2.5 through lime water?
Explain why the reaction of a metal with an acid is not always possible.
Explain why the reaction of a metal with an acid is not always possible.
Explain the purpose of using an acid-base indicator in the experiment.
Explain the purpose of using an acid-base indicator in the experiment.
What type of chemical reaction takes place when sodium carbonate (Na2CO3) reacts with hydrochloric acid (HCl)? Write the balanced chemical equation for the reaction.
What type of chemical reaction takes place when sodium carbonate (Na2CO3) reacts with hydrochloric acid (HCl)? Write the balanced chemical equation for the reaction.
Besides the reaction of metals with acids, what are some other ways to produce hydrogen gas?
Besides the reaction of metals with acids, what are some other ways to produce hydrogen gas?
Explain why the observation of carbon dioxide gas is a crucial indicator of a reaction with a carbonate or hydrogencarbonate.
Explain why the observation of carbon dioxide gas is a crucial indicator of a reaction with a carbonate or hydrogencarbonate.
In the reaction between a metal and an acid, what is the gaseous product that is always formed?
In the reaction between a metal and an acid, what is the gaseous product that is always formed?
What is the chemical formula of the salt formed when zinc metal reacts with sodium hydroxide?
What is the chemical formula of the salt formed when zinc metal reacts with sodium hydroxide?
What is the common name of the calcium hydroxide solution used to test for the presence of carbon dioxide?
What is the common name of the calcium hydroxide solution used to test for the presence of carbon dioxide?
When a metal reacts with an acid, what two classes of products are typically formed?
When a metal reacts with an acid, what two classes of products are typically formed?
Besides acids, what other type of substance is known to react with some metals to produce hydrogen gas?
Besides acids, what other type of substance is known to react with some metals to produce hydrogen gas?
What type of gas is produced when metal carbonates react with acids?
What type of gas is produced when metal carbonates react with acids?
What specific metal compound is used in Activity 2.5 to react with hydrochloric acid?
What specific metal compound is used in Activity 2.5 to react with hydrochloric acid?
What is the name of the compound formed when carbon dioxide gas is bubbled into lime water?
What is the name of the compound formed when carbon dioxide gas is bubbled into lime water?
In the reaction of metals with acids, what is the role of the metal's atoms?
In the reaction of metals with acids, what is the role of the metal's atoms?
Is the reaction of all metals with bases equally possible in producing hydrogen gas based on the text?
Is the reaction of all metals with bases equally possible in producing hydrogen gas based on the text?
What type of reaction occurs when a metal carbonate reacts with an acid?
What type of reaction occurs when a metal carbonate reacts with an acid?
What are the products of the reaction between a metal oxide and an acid?
What are the products of the reaction between a metal oxide and an acid?
What is the chemical formula for calcium bicarbonate, and is it soluble in water?
What is the chemical formula for calcium bicarbonate, and is it soluble in water?
What happens to the color of phenolphthalein when a base is added to an acidic solution where it was initially colorless?
What happens to the color of phenolphthalein when a base is added to an acidic solution where it was initially colorless?
What is the general term for the reaction between an acid and a base?
What is the general term for the reaction between an acid and a base?
What gas is produced when metal carbonates react with acids?
What gas is produced when metal carbonates react with acids?
In the experiment with copper oxide and hydrochloric acid, what color does the solution turn, and why?
In the experiment with copper oxide and hydrochloric acid, what color does the solution turn, and why?
Besides water, what other product is formed when acids react with bases?
Besides water, what other product is formed when acids react with bases?
Is calcium carbonate soluble in water?
Is calcium carbonate soluble in water?
What kind of compound is produced when a metal oxide reacts with an acid?
What kind of compound is produced when a metal oxide reacts with an acid?
What type of reaction occurs when calcium carbonate reacts with water and carbon dioxide?
What type of reaction occurs when calcium carbonate reacts with water and carbon dioxide?
What products are formed when a metal carbonate reacts with an acid?
What products are formed when a metal carbonate reacts with an acid?
What is the general chemical name for the reaction between an acid and a base?
What is the general chemical name for the reaction between an acid and a base?
In the neutralization reaction of NaOH and HCl, what are the products formed?
In the neutralization reaction of NaOH and HCl, what are the products formed?
What causes the solution to turn blue-green when copper oxide reacts with hydrochloric acid?
What causes the solution to turn blue-green when copper oxide reacts with hydrochloric acid?
What general products are formed when a metal oxide reacts with an acid?
What general products are formed when a metal oxide reacts with an acid?
When excess carbon dioxide is passed through a solution of calcium carbonate what occurs?
When excess carbon dioxide is passed through a solution of calcium carbonate what occurs?
If you added sodium hydroxide to hydrochloric acid with phenolphthalein present, what would happen to the solution's color and why?
If you added sodium hydroxide to hydrochloric acid with phenolphthalein present, what would happen to the solution's color and why?
Why does the color of phenolphthalein change to colorless when an acid like HCl is added to NaOH solution?
Why does the color of phenolphthalein change to colorless when an acid like HCl is added to NaOH solution?
What is the reaction between metal carbonates and acids analogous to?
What is the reaction between metal carbonates and acids analogous to?
What is formed when calcium carbonate reacts with excess carbon dioxide and water?
What is formed when calcium carbonate reacts with excess carbon dioxide and water?
What is the general equation for the reaction of a metal carbonate with an acid?
What is the general equation for the reaction of a metal carbonate with an acid?
What happens to phenolphthalein solution when an acid is added to a basic solution?
What happens to phenolphthalein solution when an acid is added to a basic solution?
What type of reaction occurs when sodium hydroxide is mixed with hydrochloric acid?
What type of reaction occurs when sodium hydroxide is mixed with hydrochloric acid?
What color indicates the presence of copper(II) chloride when copper oxide reacts with hydrochloric acid?
What color indicates the presence of copper(II) chloride when copper oxide reacts with hydrochloric acid?
State the products formed when a metallic oxide reacts with an acid.
State the products formed when a metallic oxide reacts with an acid.
How can the effects of a base be reversed in the presence of an acid?
How can the effects of a base be reversed in the presence of an acid?
What is the term used to describe the reaction where an acid and a base react to form salt and water?
What is the term used to describe the reaction where an acid and a base react to form salt and water?
If phenolphthalein is added to a solution of sodium hydroxide, what color will the solution be?
If phenolphthalein is added to a solution of sodium hydroxide, what color will the solution be?
What overall change occurs in pH when an acid is added to a basic solution?
What overall change occurs in pH when an acid is added to a basic solution?
What type of oxide is formed when a metal reacts with oxygen?
What type of oxide is formed when a metal reacts with oxygen?
What are metallic oxides known as, due to their reaction with acids?
What are metallic oxides known as, due to their reaction with acids?
What is produced when a metallic oxide reacts with an acid?
What is produced when a metallic oxide reacts with an acid?
What type of oxide is carbon dioxide, according to the text?
What type of oxide is carbon dioxide, according to the text?
What does calcium hydroxide react with to produce a salt and water?
What does calcium hydroxide react with to produce a salt and water?
What is the nature of non-metallic oxides, inferred from their reaction with bases?
What is the nature of non-metallic oxides, inferred from their reaction with bases?
What gas is released when a metal reacts with an acid?
What gas is released when a metal reacts with an acid?
What is a common element found in all acids that react with metals?
What is a common element found in all acids that react with metals?
What compound reacts with hydrochloric acid to produce effervescence and a gas that extinguishes a flame?
What compound reacts with hydrochloric acid to produce effervescence and a gas that extinguishes a flame?
What salt is formed when metal compound A reacts with hydrochloric acid?
What salt is formed when metal compound A reacts with hydrochloric acid?
Why are metallic oxides considered basic in nature?
Why are metallic oxides considered basic in nature?
What conclusion can be drawn about the nature of non-metallic oxides based on their reaction with bases?
What conclusion can be drawn about the nature of non-metallic oxides based on their reaction with bases?
What is the common gas liberated when an acid reacts with a metal?
What is the common gas liberated when an acid reacts with a metal?
Based on the text, what evidence suggests that hydrogen is a component common to all acids?
Based on the text, what evidence suggests that hydrogen is a component common to all acids?
What general type of chemical reaction is exemplified by the reaction of a metal compound with dilute hydrochloric acid?
What general type of chemical reaction is exemplified by the reaction of a metal compound with dilute hydrochloric acid?
What products are formed when a metallic oxide reacts with an acid?
What products are formed when a metallic oxide reacts with an acid?
How is the reaction between carbon dioxide and calcium hydroxide similar to a reaction between a base and an acid?
How is the reaction between carbon dioxide and calcium hydroxide similar to a reaction between a base and an acid?
Why does the text suggest that not all compounds containing hydrogen are necessarily acidic?
Why does the text suggest that not all compounds containing hydrogen are necessarily acidic?
If a metal compound reacts with hydrochloric acid producing a gas that extinguishes a burning candle, what gas is likely being produced?
If a metal compound reacts with hydrochloric acid producing a gas that extinguishes a burning candle, what gas is likely being produced?
According to the provided text, what is one similarity in the chemical properties of all acids?
According to the provided text, what is one similarity in the chemical properties of all acids?
Based on the text, what type of oxides are metallic oxides considered to be?
Based on the text, what type of oxides are metallic oxides considered to be?
What products are formed when a non-metallic oxide reacts with a base?
What products are formed when a non-metallic oxide reacts with a base?
What specific observation from Activity 2.3 suggests that hydrogen is common to all acids?
What specific observation from Activity 2.3 suggests that hydrogen is common to all acids?
If metal compound A reacts with dilute hydrochloric acid to produce effervescence and one product is calcium chloride, what is the identity of the metal compound A based on the text?
If metal compound A reacts with dilute hydrochloric acid to produce effervescence and one product is calcium chloride, what is the identity of the metal compound A based on the text?
Why are brass and copper vessels unsuitable for storing curd and sour substances?
Why are brass and copper vessels unsuitable for storing curd and sour substances?
What is the general equation of the reaction between a metal oxide and an acid, as implied in the text?
What is the general equation of the reaction between a metal oxide and an acid, as implied in the text?
If a gas is released during a reaction of a metal with an acid, and it extinguishes a burning candle, what is the gas and what type of metal compound would commonly react with acid to produce this?
If a gas is released during a reaction of a metal with an acid, and it extinguishes a burning candle, what is the gas and what type of metal compound would commonly react with acid to produce this?
According to Activity 2.8, what common element is present in the solutions being tested, and what are the solutions?
According to Activity 2.8, what common element is present in the solutions being tested, and what are the solutions?
What is the name of the gas that is usually liberated when an acid reacts with a metal, and how would one test for it?
What is the name of the gas that is usually liberated when an acid reacts with a metal, and how would one test for it?
What type of ions are responsible for carrying electric current through an acidic solution?
What type of ions are responsible for carrying electric current through an acidic solution?
What cation is present in all acids according to the text?
What cation is present in all acids according to the text?
What does the glowing of the bulb indicate when a solution is tested for conductivity?
What does the glowing of the bulb indicate when a solution is tested for conductivity?
What are the two ways hydrogen ions are represented in aqueous solutions?
What are the two ways hydrogen ions are represented in aqueous solutions?
What is the name of the ion that results from a hydrogen ion combining with a water molecule?
What is the name of the ion that results from a hydrogen ion combining with a water molecule?
What is required for the separation of $H^+$ ions from HCl molecules?
What is required for the separation of $H^+$ ions from HCl molecules?
What is the anion present in hydrochloric acid (HCl)?
What is the anion present in hydrochloric acid (HCl)?
What is produced when a base such as sodium hydroxide is dissolved in water?
What is produced when a base such as sodium hydroxide is dissolved in water?
In addition to water, what other substance was used to produce HCl gas in the experiment?
In addition to water, what other substance was used to produce HCl gas in the experiment?
Based on the experiment using litmus paper, is dry HCl gas acidic?
Based on the experiment using litmus paper, is dry HCl gas acidic?
Flashcards
Acids
Acids
Substances that taste sour and turn blue litmus red.
Bases
Bases
Substances that taste bitter and turn red litmus blue.
Neutralization
Neutralization
Reaction between acids and bases that cancel each other's effects.
Litmus Indicator
Litmus Indicator
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Indicators
Indicators
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Turmeric Indicator
Turmeric Indicator
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Synthetic Indicators
Synthetic Indicators
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Acidic Solution
Acidic Solution
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Basic Solution
Basic Solution
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Natural Indicators
Natural Indicators
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Sour Taste
Sour Taste
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Bitter Taste
Bitter Taste
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Litmus Color Change
Litmus Color Change
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Turmeric Reaction
Turmeric Reaction
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Methyl Orange
Methyl Orange
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Phenolphthalein
Phenolphthalein
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Acid-Base Reaction
Acid-Base Reaction
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pH Indicator Scale
pH Indicator Scale
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Lichen
Lichen
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Acids and Bases
Acids and Bases
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Litmus Test
Litmus Test
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Turmeric as Indicator
Turmeric as Indicator
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Purple Litmus
Purple Litmus
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Acid-Base Interaction
Acid-Base Interaction
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Baking Soda Solution
Baking Soda Solution
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Indicators from Flowers
Indicators from Flowers
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pH Scale
pH Scale
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Acid-Base Indicators
Acid-Base Indicators
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Litmus Color in Neutral
Litmus Color in Neutral
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Natural Materials as Indicators
Natural Materials as Indicators
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Methyl Orange and Phenolphthalein
Methyl Orange and Phenolphthalein
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Effect of Soap on Curry Stains
Effect of Soap on Curry Stains
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Purple Dye Source
Purple Dye Source
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Reactions of Acids and Bases
Reactions of Acids and Bases
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Role of Baking Soda
Role of Baking Soda
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Acidity Sensation
Acidity Sensation
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Testing Solutions
Testing Solutions
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Olfactory Indicators
Olfactory Indicators
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Hydrochloric Acid
Hydrochloric Acid
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Phenolphthalein Reaction
Phenolphthalein Reaction
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Testing with Indicators
Testing with Indicators
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Acetic Acid
Acetic Acid
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Blue Litmus Paper
Blue Litmus Paper
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Sodium Hydroxide
Sodium Hydroxide
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Testing with Onions
Testing with Onions
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Phenolphthalein vs Methyl Orange
Phenolphthalein vs Methyl Orange
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Color Change with Acids
Color Change with Acids
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Color Change with Bases
Color Change with Bases
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Using Onion as Indicator
Using Onion as Indicator
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Indicators in Lab Testing
Indicators in Lab Testing
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Hydrogen Ion Concentration
Hydrogen Ion Concentration
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Red Litmus Paper Test
Red Litmus Paper Test
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Blue Litmus Paper Test
Blue Litmus Paper Test
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Hydrochloric Acid (HCl)
Hydrochloric Acid (HCl)
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Acetic Acid (CH3COOH)
Acetic Acid (CH3COOH)
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Sodium Hydroxide (NaOH)
Sodium Hydroxide (NaOH)
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Color Change with Indicators
Color Change with Indicators
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Identifying Test Tubes
Identifying Test Tubes
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Determining pH with Indicators
Determining pH with Indicators
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Phenolphthalein Color Change
Phenolphthalein Color Change
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Testing with Onion Cloth
Testing with Onion Cloth
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Role of Indicators
Role of Indicators
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Testing Solutions Activity
Testing Solutions Activity
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Sulfuric Acid
Sulfuric Acid
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Dilute Vanilla Essence
Dilute Vanilla Essence
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Clove Oil Odour Test
Clove Oil Odour Test
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Zinc Granules Reaction
Zinc Granules Reaction
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Hydrogen Gas Test
Hydrogen Gas Test
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Acid and Zinc Observation
Acid and Zinc Observation
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Testing with Different Acids
Testing with Different Acids
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Soap Solution Experiment
Soap Solution Experiment
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Observation Recording
Observation Recording
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Chemical Properties of Acids and Bases
Chemical Properties of Acids and Bases
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Vanilla Essence Test
Vanilla Essence Test
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Burning Candle Test
Burning Candle Test
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Observations Documentation
Observations Documentation
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Dilute HCl and NaOH
Dilute HCl and NaOH
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Chemical Properties of Acids
Chemical Properties of Acids
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Testing Vanilla Essence
Testing Vanilla Essence
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Clove Oil Reaction
Clove Oil Reaction
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Hydrogen Gas Production
Hydrogen Gas Production
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Zinc Granules Activity
Zinc Granules Activity
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Testing with Clove Oil
Testing with Clove Oil
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Dilute HCl Reaction
Dilute HCl Reaction
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Testing Clove Oil
Testing Clove Oil
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Metal Reaction with Acid
Metal Reaction with Acid
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Zinc and Sodium Hydroxide
Zinc and Sodium Hydroxide
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Sodium Carbonate with Acid
Sodium Carbonate with Acid
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Sodium Hydrogen Carbonate Reaction
Sodium Hydrogen Carbonate Reaction
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Hydrogen Gas Identification
Hydrogen Gas Identification
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Lime Water Test
Lime Water Test
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Salt Formation in Reactions
Salt Formation in Reactions
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Chemical Equation for Reactions
Chemical Equation for Reactions
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Hydrochloric Acid (HCl) Use
Hydrochloric Acid (HCl) Use
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Reaction of Metal with Acid
Reaction of Metal with Acid
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Sodium Zincate Formation
Sodium Zincate Formation
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Sodium Carbonate Reaction
Sodium Carbonate Reaction
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Salt Formation
Salt Formation
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Chemical Equation
Chemical Equation
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Reaction Observation
Reaction Observation
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Metal and Acid Reaction
Metal and Acid Reaction
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Sodium Zincate Reaction
Sodium Zincate Reaction
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Observation during Reactions
Observation during Reactions
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Acid + Metal Equation
Acid + Metal Equation
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Calcium Carbonate Reaction
Calcium Carbonate Reaction
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Metal Carbonate Reaction
Metal Carbonate Reaction
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Neutralization Reaction
Neutralization Reaction
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Sodium Hydroxide and HCl
Sodium Hydroxide and HCl
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Copper Oxide and Acid
Copper Oxide and Acid
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Metal Oxide Reaction
Metal Oxide Reaction
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Limestone Composition
Limestone Composition
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Hydrochloric Acid Reaction
Hydrochloric Acid Reaction
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Reaction of Calcium Carbonate
Reaction of Calcium Carbonate
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General Reaction of Metal Carbonates
General Reaction of Metal Carbonates
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Sodium Hydroxide Reaction
Sodium Hydroxide Reaction
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Metal Oxide with Acid
Metal Oxide with Acid
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Copper Oxide Reaction Color Change
Copper Oxide Reaction Color Change
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Salts Production in Reactions
Salts Production in Reactions
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Lime Water Test for Carbon Dioxide
Lime Water Test for Carbon Dioxide
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Chemical Reactions Summary
Chemical Reactions Summary
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Metal Carbonates and Acids
Metal Carbonates and Acids
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General Reaction of Acids
General Reaction of Acids
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Activity with NaOH and HCl
Activity with NaOH and HCl
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Reaction of Carbon Dioxide
Reaction of Carbon Dioxide
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General Acid-Base Reaction
General Acid-Base Reaction
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Copper(II) Chloride Formation
Copper(II) Chloride Formation
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Carbon Dioxide Test
Carbon Dioxide Test
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Salt Definition
Salt Definition
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Hydrogen Production
Hydrogen Production
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Sodium Hydroxide with Acid
Sodium Hydroxide with Acid
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Copper Oxide with Hydrochloric Acid
Copper Oxide with Hydrochloric Acid
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Reaction of Metallic Oxides
Reaction of Metallic Oxides
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Phenolphthalein Indicator
Phenolphthalein Indicator
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Bicarbonate Formation
Bicarbonate Formation
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Salt Production
Salt Production
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Metallic Oxides
Metallic Oxides
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Non-metallic Oxides
Non-metallic Oxides
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Calcium Hydroxide Reaction
Calcium Hydroxide Reaction
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Effervescence
Effervescence
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Balanced Chemical Equation
Balanced Chemical Equation
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Acidic Nature of Non-metallic Oxides
Acidic Nature of Non-metallic Oxides
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Salts from Reactions
Salts from Reactions
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Properties of Acids
Properties of Acids
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Basic Oxides
Basic Oxides
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Acidic Oxides
Acidic Oxides
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Lime Water Reaction
Lime Water Reaction
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Balanced Equation
Balanced Equation
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Common Properties of Acids
Common Properties of Acids
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Metal Compound Reaction
Metal Compound Reaction
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Sour and Bitter Taste
Sour and Bitter Taste
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Hydrogen Gas Evolution
Hydrogen Gas Evolution
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Curd and Copper Reaction
Curd and Copper Reaction
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Dilute Hydrochloric Acid Reaction
Dilute Hydrochloric Acid Reaction
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Commonality of Acids
Commonality of Acids
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Base Reaction with Acid
Base Reaction with Acid
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Calcium Hydroxide
Calcium Hydroxide
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Hydrogen Ion
Hydrogen Ion
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Acidic Properties
Acidic Properties
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Hydronium Ion
Hydronium Ion
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Electrolytes
Electrolytes
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Ionic Dissociation
Ionic Dissociation
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Testing Acids with Litmus
Testing Acids with Litmus
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Sodium Hydroxide in Water
Sodium Hydroxide in Water
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Acids vs. Bases
Acids vs. Bases
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Properties of Bases
Properties of Bases
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Conductivity Observation
Conductivity Observation
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Study Notes
Acids, Bases, and Salts
- Sour tastes are due to acids, bitter tastes to bases
- Acidity problems can be remedied with lemon juice, vinegar, or baking soda
- Acids and bases can neutralize each other
- Acids turn blue litmus red, bases turn red litmus blue
- Litmus is a natural indicator, as is turmeric
- Synthetic indicators include methyl orange and phenolphthalein
- Litmus is a purple dye extracted from lichen
- Litmus is purple when neither acidic nor basic
- Other natural indicators include red cabbage leaves, turmeric, flowers (hydrangea, petunia, geranium)
- Onions can be used as an indicator
- Some substances change odour in acidic or basic media and can be used as olfactory indicators (e.g., vanilla, onion, clove)
- A purple dye extracted from lichen is used as an indicator for acids and bases.
- Substances like vanilla, onion, and clove change odour in acidic or basic media and can be used as indicators.
- Finely chopped onions can be used as indicators in a plastic bag with cloth overnight in the fridge, then checked for odour changes in the presence of acids or bases.
- There are other acid-base indicators or simply indicators.
- Additional natural indicators include litmus (purple), turmeric (reddish-brown in bases, yellow in acids), red cabbage (various colors in acids and bases), and flowers such as hydrangea, petunia, and geranium.
- There are some substances whose odour changes in acidic or basic media.
- Metal carbonates and bicarbonates react with acids to produce salt, carbon dioxide, and water.
- Zinc reacts with dilute sulfuric acid to produce hydrogen gas.
- Metal carbonate or metal hydrogencarbonate + Acid → Salt + Carbon dioxide + Water
- 2NaOH(aq) + Zn(s) → Na₂ZnO₂(s) + H₂(g) (Sodium zincate)
- Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + H₂O(l) + CO₂(g)
- NaHCO₃(s) + HCl(aq) → NaCl(aq) + H₂O(l) + CO₂(g)
- A few pieces of zinc granules are added to dilute sulfuric acid in a test tube and the gas given off (hydrogen) is passed through soap solution and then a lighted candle/match is brought near the gas
- Granulated zinc reacts with sodium hydroxide solution, when warmed, producing hydrogen gas
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