2. How are pH and pOH different?

you will find the answer in the explanation.

Both scales provide a measure of either the H + concentration or the OH - concentration. Notice that each scale shows were acids and bases both are located. When acids are measured, the pH is less than 7, but the pOH is greater than 7. When bases are measured, the pH is greater than 7, but the pOH is less than 7.

PH measures hydrogen ion concentration and pOH measures hydroxide ion concentration