First slide

Salt hydrolysis :

Question

A salt of weak acid and weak base undergoes

Easy

A

Only cationic hydrolysis
B

Only anionic hydrolysis
C

Both cationic and anionic hydrolysis
D

No hydrolysis

Solution

Salt of a weak acid and weak base undergoes both cationic and anionic hydrolysis.
For example CH₃COONH₄ is a salt of wek acid and weak base.
$\large C{H_3}COON{H_4}\xrightarrow{{}}C{H_3}CO{O^ - } + NH_4^ +$
Both the radicals are derivative of weak acid and base respectively, so they will both react with water.
$\large \\C{H_3}CO{O^ - } + {H_2}O \rightleftharpoons C{H_3}COOH + O{H^ - }\\\\NH_4^ + + {H_2}O \rightleftharpoons N{H_4}OH + {H^ + }$

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