Chemistry · May / June 2022 · Paper 11 · Question 25
5070The characteristic properties of acids and bases
Which statement about acids and bases is correct?
- AAll strong acids react with carbonates but all weak acids do not.
- BThe oxides of Group I metals are amphoteric.
- CThe pH of 1.0 mol/dm³ ethanoic acid, CH₃COOH, is higher than the pH of 1.0 mol/dm³ sulfuric acid, H₂SO₄.
- DThe pH of 1.0 mol/dm³ nitric acid, HNO₃, is lower than the pH of 1.0 mol/dm³ hydrochloric acid, HCl.
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Correct answer: C. The pH of 1.0 mol/dm³ ethanoic acid, CH₃COOH, is higher than the pH of 1.0 mol/dm³ sulfuric acid, H₂SO₄.
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