Question

Explain the Hydrolysis of weak acid - weak base (WA - WB) type salt.

Answer 1

Hydrolysis of (WA - WB) type salt : 

Ex: NH₄CN, CaCO₃, (NH₄)₂ CO₃, ZnHPO₃ 

Solution is almost neutral but it may be acidic or basic depending upon the nature of acid & base & pH of the solution is near to 7.

(a) Relation between K_h , K_w, K_a & K_b 

(2) Degree of Hydrolysis 

(b ) pH of the solution 

From eq. (3)