Question

If the hydrogen ion concentration in a solution is `7.10 x 10^-5` mol/L, what is the pH?

Answer 1

`pH~=4`

Explanation:

`pH=-log_10[H_3O^+]`.

We are given that `[H_3O^+]=7.10xx10^-5*mol*L^-1`.

And thus `pH=-log_10(7.10xx10^-5)~=4`