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HX is a weak acid (K(a) = 10^(-5)). If f...

`HX` is a weak acid `(K_(a) = 10^(-5))`. If forms a salt `NaX(0.1M)` on reacting with caustic soda. The degree of hydrlysis of `NaX` in % is

A

0.0001

B

1.0E-6

C

0.001

D

0.005

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(h)(X^(-)) = K_(w)/K_(a) = 10^(-14)/10^(-5) = 10^(-9)`
`alpha = sqrt(K_(h)/C) = 10^(-9)/0.10 = 10^(-4)`
% hydrolysis = 0.01
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