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The dissociation constant of a substitut...

The dissociation constant of a substituted benzoic acid at `25^(@)C` is `1.0xx10^(-4)`. The `pH` of `0.01M` solution of its sodium salt is

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The correct Answer is:
8
`[8]`
For Salt of weak acid and strong base `pH=7+1/2[(-log1xx10^(-4))+log(0.01)]`
`=7+1/2(4-2)=8`
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