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CBSE Class 11-science Answered

what is cationic hydrolysis and anionic hydrolysis?
Asked by | 10 Nov, 2013, 07:18: PM
answered-by-expert Expert Answer

Salt hydrolysis: It is defined as a reaction in which cation or anion or both of a salt react with water to produce acidity or alkalinity.

The reaction of an anion or cation with water accompanied by cleavage of O-H bond is called hydrolysis.

A-         +    H – O – H                         HA        +         OH-

                                                                   Anionic hydrolysis

B+        +    H – O – H                        BOH     +           H+

                                                               Cationic hydrolysis

In anionic hydrolysis, the solution becomes slightly basic (p H >7).

In cationic hydrolysis, the solution becomes slightly acidic (p H <7).

Salts of weak acids and strong bases undergo anionic hydrolysis and yield basic solution.

Salts of weak bases and strong acids undergo cationic hydrolysis and yield slightly acidic solution.

Answered by Vaibhav Chavan | 11 Nov, 2013, 10:27: AM
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