WAEC Chemistry 2025 Theory — Question 10

Model answer

An acid salt is one in which the replaceable hydrogen atoms are partially replaced by a metal or ammonium ion; a salt which still contains replaceable hydrogen ions, e.g. KHSO4, NaHSO4. They are formed from a strong acid and a weak base and produce an acidic solution when dissolved in water, e.g. NH4Cl(aq) -> NH4+(aq) + Cl-(aq).