# How are pH and pOH related?

May 12, 2016

The pH and pOH of a substance will always total 14.

#### Explanation:

pH means "power of hydrogen" and is a measure of the hydrogen ion concentration.

If the concentration of ${H}^{+}$ ions is ${10}^{-} 1$, the pH is 1, and the pOH is 13.

${10}^{-} 1 = 0.1$

${10}^{-} 13 = \text{0.000 000 000 0001}$

The ${H}^{+}$ concentration is much higher than the $O {H}^{-}$ concentration, which makes the substance acidic.