A student measures the pH of a propanoic acid solution as 2.8. The student concludes that propanoic acid is a strong acid because the pH is low.
Explain why this result alone does not show whether the propanoic acid is strong or weak.
97 exam-style questions on AQA GCSE Chemistry 7.2 Reactions of alkenes and alcohols, covering 7.2.1 Structure and formulae of alkenes, 7.2.2 Reactions of alkenes, 7.2.3 Alcohols, 7.2.4a Carboxylic acids, and 7.2.4b Carboxylic acids as weak acids. Each one has a worked solution and a mark scheme showing where the marks go.