Question

The pH of 0.1M solution of cyanic acid (HCNO) is 2.34. Calculate the ionization constant of the acid and its degree of ionization in the solution.

Answer 1

Answer for the same is as follows PH = 2.34

PH = -LOG [H+]

[H+] = Antilog[-2.34] = 4.57 x 10-3

For,

Weak acid [H+] = ca = 4.57 x 10-3

c = 0.1 M

a = 4.57 x 10-3/0.1 = 0.0457

Ka = a2/c  = (0.0457)2/0.1 = 2.09 x 10-4