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Questions and Answers
Which substance is classified as a base?
Which substance is classified as a base?
- Sulfuric acid
- Carbon dioxide
- Sodium hydroxide (correct)
- Hydrochloric acid
What is the pH distinction for acidic substances?
What is the pH distinction for acidic substances?
- Greater than 7
- Less than 7 (correct)
- Equal to 7
- Exactly 0
What color does phenolphthalein turn when it encounters a base?
What color does phenolphthalein turn when it encounters a base?
- Pink (correct)
- Green
- Yellow
- Red
Which of the following is known as the chemical name for vinegar?
Which of the following is known as the chemical name for vinegar?
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What is produced when a base dissolves in water?
What is produced when a base dissolves in water?
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Which compound is classified as a salt?
Which compound is classified as a salt?
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Which process is utilized for the manufacture of sodium hydroxide?
Which process is utilized for the manufacture of sodium hydroxide?
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What are the main products when an acid reacts with a base?
What are the main products when an acid reacts with a base?
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Study Notes
Acids and Bases Overview
- HCl is classified as an acid.
- NaOH is recognized as a base.
- Litmus paper turns blue in the presence of a base.
- Acids produce hydrogen ions when dissolved in water.
- Phenolphthalein turns pink in a basic solution.
Chemical Compounds
- Sodium hydroxide (NaOH) is the chemical name for NaOH.
- NaCl (sodium chloride) is an example of a salt.
- The pH of an acidic substance is less than 7.
- Calcium hydroxide is commonly referred to as slaked lime.
pH Scale and Neutralization
- Bases have a pH value greater than 7.
- A neutral substance has a pH of 7.
- Neutralization reactions yield salt and water.
- When an acid reacts with a base, the main products are salt and water.
Common Chemical Substances
- Baking soda is chemically known as NaHCO₃.
- Acetic acid is commonly known as vinegar.
- HCl reacts with NaOH to form NaCl.
- Plaster of Paris has the chemical formula CaSO₄.½H₂O.
Manufacturing Processes
- Sodium hydroxide (NaOH) is manufactured through the chlor-alkali process.
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