At 25 ° C , the ionisation constant of anilinium hydroxide is 4 . 6 × 10 - 10 . Taking ionic product of water as 1 × 10 - 14 . Calculate hydrolysis constant of anilinium chloride, the degree of hydrolysis and pH value of 0 . 2 molar solution of the salt.

K b = 4 . 6 × 10 - 10 C = 0 . 2 M K w = 1 × 10 - 14 Anilinium chloride is a salt of a weak base and a strong acid, ∴ K h = K w K b = 10 - 14 4 . 6 × 10 - 10 = 2 . 17 × 10 - 5 Degree of hydrolysis, h = K h C = 2 . 17 × 10 - 5 0 . 2 = 1 . 085 × 10 - 4 = 1 . 04 × 10 - 2 The given salt will undergo cationic hydrolysis as C 6 H 5 NH 3 + + H 2 O ⇌ C 6 H 5 NH 2 + H 3 O + Initial conc. 0 . 2 M At. eq. 0 . 2 - 0 . 2 × 1 . 04 × 10 - 2 2 . 08 × 10 - 3 2 . 08 × 10 - 3 ∴ pH = - log H 3 O + = - log 2 . 08 × 10 - 3 = - log ( 2 . 08 ) + 3 = - 0 . 318 + 3 = 2 . 682

At 25 ° C , the ionisation constant of anilinium hydroxide is 4 . 6 × 10 - 10 . Taking ionic product of water as 1 × 10 - 14 . Calculate hydrolysis constant of anilinium chloride, the degree of hydrolysis and pH value of 0 . 2 molar solution of the salt.

K b = 4 . 6 × 10 - 10 C = 0 . 2 M K w = 1 × 10 - 14 Anilinium chloride is a salt of a weak base and a strong acid, ∴ K h = K w K b = 10 - 14 4 . 6 × 10 - 10 = 2 . 17 × 10 - 5 Degree of hydrolysis, h = K h C = 2 . 17 × 10 - 5 0 . 2 = 1 . 085 × 10 - 4 = 1 . 04 × 10 - 2 The given salt will undergo cationic hydrolysis as C 6 H 5 NH 3 + + H 2 O ⇌ C 6 H 5 NH 2 + H 3 O + Initial conc. 0 . 2 M At. eq. 0 . 2 - 0 . 2 × 1 . 04 × 10 - 2 2 . 08 × 10 - 3 2 . 08 × 10 - 3 ∴ pH = - log H 3 O + = - log 2 . 08 × 10 - 3 = - log ( 2 . 08 ) + 3 = - 0 . 318 + 3 = 2 . 682