Calculate the pH of a solution made by a mixture of the following acids: 0.40 M HC₂H₃O₂ (K_a = 1.8 *10^-⁵), 0.10 M HOCl (K_a = 3.5 *10^-⁸), and 0.20 M HCN (K_a = 6.2 *10^-¹⁰). A) 2.57 B) 3.92 C) 4.95 D) 4.23 E) 3.49

Question

Quizplus · Accepted Answer

The strongest acid, HC2H3O2, will dominate the pH. Calculate pH using its concentration and Ka: pH = -log(sqrt(0.40 * 1.8 * 10^-5)) ≈ 2.57.

Calculate the PH of a Solution Made by a Mixture