Equal volumes of three acid solutions of `pH 3, 4` and `5` are mixed in a vessel. What will be the `H^(+)` ion concentration in the mixture?

Options

A. `3.7xx10^(-4)M`
B. `3.7xx10^(-3)M`
C. `1.11xx10^(-3)M`
D. `1.11xx10^(-4)M`

Answer

A

Explanation

The problem is valis only if strong acid are mixed. After mixing equal volumes of three, acids, total volume =3V
`[H^(+)]` after mixing `=(10^(-3)xV)/(3V)+(10^(-4)xV)/(3V)+(10^(-5)xV)/(3V)`