Why is pOH important?

Mar 28, 2018

I will try to explain.

Explanation:

$p H$ and $p O H$ go hand in hand and make up a fundamental relationship in acid-base chemistry:

$p H + p O H = p K w$

Where $p K w = 14$ at 25 degrees Celcius, though the value varies with temperature.

This is important since when doing calculations we typically answer in pH and this relationship allows us to relate the $p H$ which is the negative logarithm of ${H}^{+}$ concentration, against $p O H$ which is the negative logarithm of the $O {H}^{-}$ concentration in a solution.

This property allows us to say something about both the Hydroxide concentration and the proton concentration in a solution.