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A certain buffer solution sontains equal...

A certain buffer solution sontains equal concentration of `X^(-)` and `HX`. The `K_(a)` for `HX` is `10^(-8)`. The of the buffer is

A

3

B

4

C

11

D

14

Text Solution

Verified by Experts

The correct Answer is:
B
`pH=pK_(a)+log.(["Salt"])/(["Acid"])`
`=-log (1.0 xx 10^(-8)) +log. (0.1)/(0.1)`
`-log 10^(-8) +0=8`
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