Multiple choice What is the pH of a solution that has [OH-] = 0.005 2.3 11.7 2.30 11.70 Reveal answer Fill a bubble to check yourself B Correct answer Explanation pOH = -log(0.005) = 2.3. pH = 14 - 2.3 = 11.7. Both B and D are numerically correct, but B is the standard format.