A salt formed by an acid-base reaction gives an acidic solution. What does this indicate about the parent substances?
Answer and explanation
Correct answer: The acid may be strong and the base weak
Salt hydrolysis explains the observation. A salt produced from a strong acid and a weak base commonly gives an acidic aqueous solution because its positive ion hydrolyses water and increases hydrogen-ion concentration. Thus option A is the best conclusion, although the wording “may be” is important because solution behaviour also depends on relative strengths and concentration. Strong acid–strong base salts are generally neutral.
Frequently asked questions
What is the correct answer to this question?
The acid may be strong and the base weak
Why is this the correct answer?
Salt hydrolysis explains the observation. A salt produced from a strong acid and a weak base commonly gives an acidic aqueous solution because its positive ion hydrolyses water and increases hydrogen-ion concentration. Thus option A is the best conclusion, although the wording “may be” is important because solution behaviour also depends on relative strengths and concentration. Strong acid–strong base salts are generally neutral.
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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