The `P^(H)` of `0.01 M` solution of acetic acid is `5.0` What are the values of `[H^(+)]` and `Ka` respectively ?

Options

A. `2 xx 10^(-4)M, 2 xx 10^(-8)`
B. `1 xx 10^(-5) M, 1 xx 10^(-9)`
C. `1 xx 10^(-5) M, 1 xx 10^(-8)`
D. `1 xx 10^(-4) M, 1 xx 10^(-6)`

Answer

C

Explanation

`[H^(+)] = 10^(-PH) = 10^(-5)`
`= sqrt(Ka xx c)`
`(":. C = 0.01 M)`
`rArr Ka = ([H^(+)]^(2))/(C) = (10^(-10))/(10^(-2)) = 10^(-8)`