A certain buffer solution contains equal...

A certain buffer solution contains equal concentartion of `X^(Theta)` and `HX`. The `K_(b)` for `X^(Theta)` is `10^(-10)`. The `pH` of the buffer is

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The correct Answer is:

4

`pH=pK_(B)+log([X^(-)])/([HX]),k_(a)=10^(-4)`

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