pOH Definition (Chemistry)

Chemistry Terminology: Definition of pOH

pOH is a measure of hydroxide ion concentration or alkalinity.
pOH is a measure of hydroxide ion concentration or alkalinity. Stephan Zabel / Getty Images

pOH Definition: pOH is a measure of hydroxide ion (OH-) concentration.

pOH is a measure of the alkalinity of a solution.

Aqueous solutions at 25°C with pOH less than 7 are alkaline, pOH greater than 7 are acidic and pOH equal to 7 are neutral.