The `OH^(-)` ion concentration of a solution is `3.2 xx 10^(-4) M`. find out the `H^(+)` ion concentration of the same solution is

Options

A. `3 xx 10^(-6) M`
B. `6 xx 10^(-13) M`
C. `3.125 xx 10^(-11) M`
D. `2 xx 10^(-4) M`

Answer

C

Explanation

`K_(w) = [H^(+)][OH^(-)]`
`[OH^(-)] = 3.2 xx 10^(-14) M, [H^(+)] = (1 xx 10^(-14))/(3.2 xx 10^(-14))`
`= 0.3125 xx 10^(-10) = 3.125 xx 10^(-11)`