Define salt hydrolysis. Explain the nature of aqueous solution of CuSO_(4), on the basis of the above phenomenon

Define salt hydrolysis. Explain the nature of aqueous solution of CuSO

1.	Define salt hydrolysis. Explain the nature of aqueous solution of CuSO_(4), on the basis of the above phenomenon
Answer» Solution :The phenomenon in which a salt on dissolution in WATER forms a parent acid and a parent alkali resulting in acidic, BASIC or NEUTRAL solution is called salt hydrolysis. It is the most important property of salts. `CuSO_(4)` on hydrolysis produces a strong acid that IONISES and a WEAK base that does not ionsie. This increases the concentration of `H^(+)` ions making the solution acidic with `pH lt 7` ( at `25^(@)C`) `Cu^(+2) + SO_(4)^(-1) + 2H_(2)O rarr Cu(OH)_(2) + 2H^(+) + SO_(4)^(-2)` As cation of the salt reacts with water, it is called cationic hydrolysis