Which option correctly gives an example of a strong acid and a weak acid?
Answer and explanation
Correct answer: Hydrochloric acid and ethanoic acid
Acid strength depends on the extent of ionisation in water, not simply on concentration. Hydrochloric acid ionises almost completely and is classified as a strong acid. Ethanoic acid ionises only partially and is therefore a weak acid. Option A contains an acid and a base, while C and D do not present a strong-acid/weak-acid pair. Hence hydrochloric acid followed by ethanoic acid in option B is correct.
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What is the correct answer to this question?
Hydrochloric acid and ethanoic acid
Why is this the correct answer?
Acid strength depends on the extent of ionisation in water, not simply on concentration. Hydrochloric acid ionises almost completely and is classified as a strong acid. Ethanoic acid ionises only partially and is therefore a weak acid. Option A contains an acid and a base, while C and D do not present a strong-acid/weak-acid pair. Hence hydrochloric acid followed by ethanoic acid in option B is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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