What is the pH of a 0.0052 M CaOH solution?
A)8.74
B)11.72
C)2.28
D)5.26
E)16.28

Question

Quizplus · Accepted Answer

Calcium hydroxide (CaOH) is a strong base that completely dissociates in water to form Ca2+ and OH- ions. 
Ca(OH)2 → Ca2+ + 2OH-
Since the molarity of CaOH is 0.0052 M, the concentration of OH- ions is also 0.0052 M.
Now, we can use the following equation to calculate the pH:
pH = 14 - log[OH-]
pH = 14 - log[0.0052]
pH = 14 + 2.28
pH = 11.72
Therefore, the correct answer is B (11.72).

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