# What is the pH of a solution with a hydrogen ion concentration of 3.5*10^-4?

##### 1 Answer
Jun 12, 2016

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

#### Explanation:

$p H$ $=$ $- {\log}_{10} \left(3.5 \times {10}^{-} 4\right)$ $=$ $- \left(- 3.46\right)$

$=$ $3.46$

Using antilogarithms. can you tell me the $p H$ of a solution that is ${10}^{-} 7$ $m o l \cdot {L}^{-} 1$ with respect to ${H}_{3} {O}^{+}$.