Determine the pH of the following aqueous solution.Initial concentrations are given.
[NH₃] = 1.20 M,[KOH] = 0.320 M,K_b for NH₃= 1.8 × 10^-5

Question

Determine the pH of the following aqueous solution.Initial concentrations are given. [NH₃] = 1.20 M,[KOH] = 0.320 M,K_b for NH₃= 1.8 × 10^-5 A)13.5 B)8.7 C)9.8 D)11.7 E)12.2

Quizplus · Accepted Answer

The solution contains both NH3 and KOH. KOH is a strong base and will dominate the pH. The concentration of OH- from KOH is 0.320 M, which gives a pOH of -log(0.320) = 0.49. Therefore, the pH is 14 - 0.49 = 13.51, approximately 13.5.

Determine the PH of the Following Aqueous Solution