Along with the pH scale, there is the pOH scale, which indicates the level of "basicity" in a solution. Accordingly, pOH = -log[OH^-]. What is the sum of the pH and the pOH of a solution always equal to?

Question

Quizplus · Accepted Answer

The pH and pOH scales are inversely related, meaning that an increase in pH results in a decrease in pOH and vice versa. The product of the hydronium and hydroxide ions is always equal to Kw, which is 1.0 x 10^-14 at 25°C. Therefore, the sum of the pH and pOH must always equal the negative log of Kw, which is 14.

Along with the PH Scale, There Is the POH Scale