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Questions and Answers
What is observed when a burning candle is brought near a gas-filled bubble produced from the reaction of an acid and a metal?
What is observed when a burning candle is brought near a gas-filled bubble produced from the reaction of an acid and a metal?
The bubble pops with a 'pop' sound, indicating the presence of hydrogen gas.
Name one of the acids, besides sulphuric acid, used in Activity 2.3 to react with zinc granules.
Name one of the acids, besides sulphuric acid, used in Activity 2.3 to react with zinc granules.
Hydrochloric acid (HCl)
What is mixed with dilute sulphuric acid in Activity 2.3?
What is mixed with dilute sulphuric acid in Activity 2.3?
Zinc granules
What type of indicator is vanilla essence when testing for acids and bases?
What type of indicator is vanilla essence when testing for acids and bases?
What happens to the odour of vanilla essence when it reacts with an acid or a base?
What happens to the odour of vanilla essence when it reacts with an acid or a base?
What is passed through the soap solution in the experiment with acids and metals?
What is passed through the soap solution in the experiment with acids and metals?
What is the first step in checking the odour of cloth strips?
What is the first step in checking the odour of cloth strips?
Besides vanilla, what is another substance mentioned that can be used as an olfactory indicator?
Besides vanilla, what is another substance mentioned that can be used as an olfactory indicator?
What is the caution given at the beginning of activity 2.3?
What is the caution given at the beginning of activity 2.3?
What is dilute NaOH solution?
What is dilute NaOH solution?
Flashcards
Olfactory Indicators
Olfactory Indicators
Substances that change odor in the presence of acids or bases.
Dilute Vanilla Essence
Dilute Vanilla Essence
A solution of vanilla used to test changes in odor with acids/bases.
Clove Oil
Clove Oil
An essential oil that can also serve as an olfactory indicator.
Chemical Reaction with Metals
Chemical Reaction with Metals
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Sulphuric Acid
Sulphuric Acid
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Bubbles in Soap Solution
Bubbles in Soap Solution
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Burning Candle Test
Burning Candle Test
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Neutralization
Neutralization
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Hydrogen Gas
Hydrogen Gas
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Types of Acids
Types of Acids
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Study Notes
Chemical Properties of Acids and Bases
- Olfactory Indicators: Vanilla, onion, and clove can be used as olfactory indicators to observe changes in odour when exposed to acids and bases.
Reaction of Acids and Bases with Metals
- Activity 2.3: This activity requires teacher assistance.
- Procedure: Dilute sulfuric acid is mixed with zinc granules. The gas generated is passed through a soap solution. A burning candle is brought near the gas bubble.
- Observations: Bubbles form in the soap solution; the gas ignites when a flame is brought close to it.
- Conclusion: The reaction of a metal (zinc) with an acid (sulfuric acid) produces hydrogen gas.
- Further Experiments: Test the reaction of zinc with other acids (e.g., HCl, HNO₃, CH₃COOH) and compare the observations to see if there are differences / similarities.
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Description
This quiz explores the chemical properties of acids and bases, focusing on olfactory indicators and their reactions with metals. Engage with experiments involving zinc and sulfuric acid to understand the production of hydrogen gas. It's a great way to deepen your knowledge of fundamental chemical reactions.
