The concentration of H+ in a solution is 1x10-12. What is the pOH of the solution?
  1. 2
  2. 3
  3. 6
  4. 12
  5. 14
Explanation
Answer: 2

The pH of a solution is -log[H+]. In the context of this question, pH = -log[1x10-12] = 12. pOH is 14-pH. Thus, the pOH of this solution is 2.
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