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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

8

C

11

D

14

Text Solution

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