The ionisatioln constant of a mono basic...

The ionisatioln constant of a mono basic acid is `5 xx 10^(-2)`. The pH of `0.01 M` acid solution is

A

`1.30`

B

`3.30`

C

`5.0`

D

1.65

Verified by Experts

The correct Answer is:

D

`[H^(+)]=sqrt(ka.c)=sqrt(5xx10^(-2)xx10^(-2))`
`=sqrt(5xx10^(-4))=2.2xx10^(-2)`
`P^(H)=-log[H^(+)]=P^(H)=1.65`

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