The salt which is formed of weak acid & weak base
Correct answer: C. CH₃COONH₄
- A. KCl
- B. KNO₃
- C. CH₃COONH₄
- D. CH₃COONa
Explanation
The correct answer is CH₃COONH₄ because it is a salt formed from the reaction between a weak acid (acetic acid) and a weak base (ammonia). This combination leads to a salt that does not completely dissociate in water, and its pH depends on the relative strengths of the acid and base. In contrast, KCl and KNO₃ are formed from strong acids and strong bases, resulting in neutral salts. CH₃COONa, while involving a weak acid (acetic acid), is paired with a strong base (sodium hydroxide), resulting in a basic salt.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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