Question

Give three reasons with equations wherever required, why sulphuric acid is a dibasic acid.

Answer 1

Sulphuric acid (H₂SO₄ ) is a dibasic acid as explained below: 

(1) It ionises in aqueous solution to produce two hydrogen ions per molecule of the acid.

OR

It contains two replace all hydrogen ions per molecule of the acid.

H₂SO₄ (aq) ⇋ 2H⁺(aq) + SO₄^2-(aq)

(2) It ionises in two steps in aqueous solution as shown below:

(3) It forms two types of salt, e., normal salt and acid salt as shown below: