[2] CATIONIC SALT HYDROLYSIS:

(2) CATIONIC HYDROLYSIS OR ACIDIC SALTS HYDROLYSIS:

          (Salt of a Weak Base and a Strong Acid)

      Let the acid be HCl and the base be NH₄OH. Therefore the salt would be NH₄Cl.

      NH₄Cl completely dissociates into NH₄⁺and Cl^– ions.

      HCl being a strong acid dissociates completely to give H⁺ ions and Cl^– ions.

In this hydrolysis, NH₄OH and H⁺ are being produced. This implies that the solution is acidic

To calculate pH,

Multiplying and dividing by OH^– and rearranging,

Now, substituting the concentrations,

ILLUSTRATIVE EXAMPLE (1):

ILLUSTRATIVE EXAMPLE (2):

ILLUSTRATIVE EXAMPLE (3):

ILLUSTRATIVE EXAMPLE (4):

ILLUSTRATIVE EXAMPLE (5):