Question
Derive the relation, in the case of hydrolysis of salts of strong acids and weak acids.
Solution
Let the salt of strong acid and weak base (such as CuSO4) be X Y and the hydrolysis reaction represented as:

[H2O] remains constants as it is taken in large excess. Following equilibrium also occurs:

Substituting the values from equation (1) in equation (4),


[H2O] remains constants as it is taken in large excess. Following equilibrium also occurs:

Substituting the values from equation (1) in equation (4),
