Calculate the pH of a 0.048 M solution of KOH.
A) 12.68
B) 11.32
C) 1.32
D) 2.68
E) none of these

Name: Calculate the pH of a 0.048 M solution of KOH. A) 12.68 B) 11.32 C) 1.32 D) 2.68 E) none of these
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Quizplus · Accepted Answer

KOH is a strong base that dissociates completely in water to K+ and OH- ions. The concentration of OH- ions in the solution is equal to the concentration of KOH, which is 0.048 M. To find the pOH, use the formula pOH = -log[OH-]. pOH = -log(0.048) ≈ 1.32. Since pH + pOH = 14, pH = 14 - 1.32 = 12.68.

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