# What is the pH and pOH if the H+ concentration is 1*10^-4?

Dec 6, 2015

pH=4
pOH=10

#### Explanation:

The following relations have been used to solve the problem

$\left[{H}^{+}\right] \left[O {H}^{-}\right] = {10}^{-} 14 \text{ " " } \left(1\right)$

$p H = - \log \left[{H}^{+}\right]$

$p H + p O H = 14 \to$ this relation is obtained by applying log on both sides of equation $\left(1\right)$

Given

$\left[{H}^{+}\right] = {10}^{-} 4 \implies \left[O {H}^{-}\right] = {10}^{-} 10$

$p H = - \log \left[{H}^{+}\right] = 4$

$p O H = 14 - p H = 14 - 4 = 10$