Determine the pH of the following aqueous solution.Initial concentrations are given.
[HC₂H₃O₂] = 0.250 M,[HCl] = 0.120 M K_a(acetic acid) = 1.8 × 10^-5

Question

Determine the pH of the following aqueous solution.Initial concentrations are given. [HC₂H₃O₂] = 0.250 M,[HCl] = 0.120 M K_a(acetic acid)= 1.8 × 10^-5 A)0.60 B)0.92 C)0.43 D)4.74 E)13.08

Quizplus · Accepted Answer

The pH is primarily determined by the strong acid HCl, which fully dissociates. The concentration of H+ from HCl is 0.120 M, so pH = -log(0.120) ≈ 0.92. The weak acid (acetic acid) contributes insignificantly to the H+ concentration compared to HCl.

Determine the PH of the Following Aqueous Solution