# What does a solution with a hydronium ion concentration of 10^-11 M have a pH of?

Dec 13, 2016

$p H = 11$

#### Explanation:

$p H = - {\log}_{10} \left[{H}_{3} {O}^{+}\right]$

$\left[{H}_{3} {O}^{+}\right] = {10}^{-} 11 \cdot m o l \cdot {L}^{-} 1$

$- {\log}_{10} \left[{H}_{3} {O}^{+}\right] = - {\log}_{10} \left({10}^{-} 11\right) = - \left(- 11\right) = 11$.

Clearly, this is an aqueous solution. Is this an acidic or basic solution?