A solution of KOH is found to have [OH^-] = 0.010 M. What is the pH of this solution?

Name: A solution of KOH is found to have [OH - ] = 0.010 M. What is the pH of this solution?
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Question

Quizplus · Accepted Answer

KOH is a strong base and completely ionizes in water to form K+ and OH- ions. Therefore, [OH-] = 0.010 M.
pH = -log[H+]
Since this is a basic solution, we need to first use the equation:
pH + pOH = 14
pOH = -log[OH-] = -log(0.010) = 2
pH = 14 - pOH = 14 - 2 = 12. Thus, the answer is B.

A Solution of KOH Is Found to Have [OH -

A Solution of KOH Is Found to Have [OH^-