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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

A

4

B

7

C

10

D

14

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(a)(HX) = K_(w)/K_(b) = 10^(-4)`
`pH = pK_(a) + log[X^(-)]/[HX]`
`implies pK_(a) = 4 [:'[X^(-)]=[HX]]`
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