If a salt is formed by mixing an acid and a base, when is its aqueous nature most likely to be neutral?
Answer and explanation
Correct answer: When the salt is formed from a strong acid and a strong base
The governing concept is salt hydrolysis and the relative strengths of the parent acid and base. A salt produced from a strong acid and a strong base, such as sodium chloride from hydrochloric acid and sodium hydroxide, generally does not hydrolyse appreciably in water. Its aqueous solution is therefore approximately neutral, with pH near 7. Salts involving a weak acid or weak base are commonly acidic or basic, so options B and C are not the best answer.
Frequently asked questions
What is the correct answer to this question?
When the salt is formed from a strong acid and a strong base
Why is this the correct answer?
The governing concept is salt hydrolysis and the relative strengths of the parent acid and base. A salt produced from a strong acid and a strong base, such as sodium chloride from hydrochloric acid and sodium hydroxide, generally does not hydrolyse appreciably in water. Its aqueous solution is therefore approximately neutral, with pH near 7. Salts involving a weak acid or weak base are commonly acidic or basic, so options B and C are not the best answer.
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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