Calculate the pH of a 0.02 M solution of KOH.
A) 1.7
B) We cannot calculate the answer unless a volume is given.
C) 12.3
D) 2.0
E) 12.0

Question

Quizplus · Accepted Answer

KOH is a strong base that dissociates completely in water to K+ and OH- ions. The concentration of OH- ions in a 0.02 M KOH solution is also 0.02 M. To find the pH, we first calculate the pOH using the formula pOH = -log[OH-], which gives pOH = -log(0.02) ≈ 1.7. Since pH + pOH = 14 for aqueous solutions at 25°C, the pH is 14 - 1.7 = 12.3.

Calculate the PH of a 0