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A weak acid HX has the dissociation cons...

A weak acid HX has the dissociation constant `1 xx 10^(-5)`. M. It forms a salt NaX on reaction with alkali. The degree of hydrolysis of 0.1 M solution of NaX is

A

`0.0001%`

B

`0.01%`

C

`0.1%`

D

`0.15%`

Text Solution

Verified by Experts

The correct Answer is:
B
Hydrolysis reaction is `X^(-) + H_(2)O hArr HX+OH^(-)` For a salt of weak acid with strong base, `K_(h)=(K_(w))/(K_(a))=ch^(2)`
`:. (10^(-14))/(10^(-5))=0.1xxh^(2) or h^(2) = 10^(-8) or h = 10^(-4)`
% hydrolysis `= 10^(-4) xx 100 = 10^(-2) = 0.01`
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