Answer:
pOH = 2.35
Explanation:
The pH scale is a way to measure the concentration of H⁺ ions in a solution. On the other hand, pOH is a way to refer to the concentration of OH⁻ in a solution. pH and pOH are related through the following equation:
pH + pOH = 14
If pH = 11.65, then
pOH = 14 - pH = 14 -11.65 = 2.35
When pH > 7 and pOH < 7, the solution is basic.