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A weak acid HX(K(a) = 10^(-5)) on reacti...

A weak acid `HX(K_(a) = 10^(-5))` on reaction with `NaOH` gives `NaX`. For `0.1M` aqueous solution of `NaX`, the `%` hydrolysis is

A

`0.01%`

B

`0.001%`

C

`0.1%`

D

`0.5%`

Text Solution

Verified by Experts

The correct Answer is:
A
For a salt of weak acid and strong base.
degree of hydrolysis `= sqrt((K_(w))/(CK_(a))) = sqrt((10^(-14))/(0.1xx10^(-5))) = 10^(-4)`
Precentage of hydrolysis `= 10^(-4) xx 100 = 0.01%`
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