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pH of a mixture containing 0.10 M X^(-) ...

`pH` of a mixture containing `0.10 M X^(-)` and `0.20 M HX` is: `[pK_(b)(X^(-))=4]`

A

4+ log 2

B

4- log 2

C

10 + log 2

D

10 - log 2

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The correct Answer is:
d
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