If the pH of a solution is 5, what its the pOH

9

Explanation:

Given parameters:

pH of solution = 5

Unknown;

pOH of the solution = ?

Solution:

The pH scale is a scale that delineates the hydrogen ion concentration of a solution. It marked from 1 to 14.

pH = - log[H⁺]

For any aqueous solution, the sum of the pH and pOH is 14;

pH + pOH = 14

since pH = 5;

pOH = 14 - pH

pOH = 14 - 5 = 9

The pOH of the solution is 9.