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What fraction of a strong acid ionizes when it dissolves in water?
AAll of it, or very nearly all
BAbout half of the acid present
CA very small fraction of it
DNone of it until it is heated
Answer & Solution
Correct answer: A. All of it, or very nearly all
1. A strong acid ionizes essentially completely in aqueous solution.
2. So virtually every molecule hands its proton to water.
3. Hydrochloric, nitric and sulfuric acids all behave this way.
4. A weak acid, by contrast, gives only small amounts of those ions.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 14 "Acid-Base Equilibria", section 14.3 Relative Strengths of Acids and Bases_
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