Question

Name three classes of substances, which react with an acid to form salts. Write equations to describe their reactions with suitable acids.

Answer 1

Three different classes of substances are a metal, a base and a metallic carbonate, which react with an acid to form salts.

(i) Zinc, a metal reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas is liberated.

Zn + H₂SO₄ → ZnSO₄ + H₂

(ii) Sodium hydroxide, a base reacts with dilute nitric acid to form sodium nitrate and water.

NaOH + HNO₃ → NaNO₃ + H₂O

(iii) Magnesium carbonate a metallic carbonate reacts with dilute hydrochloric acid to form magnesium chloride, water and carbon dioxide gas is liberated.