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In a buffer solution containing equal co...

In a buffer solution containing equal contration of `B^(-)` and H B, the `K_(b)` for `B^(-)` is `10^(-10)`. The pH of buffer solution is

A

10

B

7

C

6

D

4

Text Solution

Verified by Experts

The correct Answer is:
D
For acidic buffer solution
`pH=pKa+log (["salt"])/(["Acid"])`
Given `[B^(-)]=[HB]`
and `K_(b)`for `B^(-)=10^(-10)`
`So K_(a)=10^(-4)` for HB
`pH=Pka=4`
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