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The dissociation constant of a weak mono...

The dissociation constant of a weak monobasic acid in `0.01 M` solution is `10^(-8)`. What is its `[OH^(-)]` concentration?

A

`10^(-6)`

B

`10^(-8)`

C

`10^(-9)`

D

`10^(-10)`

Text Solution

Verified by Experts

The correct Answer is:
D
`[H^(+)]=sqrt(KC)=sqrt(10^(-8)xx10^(-2))=10^(-5)`
`[OH^(-)]=(K_(w))/([H^(+)])=(10^(-14))/(10^(-5))=10^(-9)M`
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