What is the pH of a solution in which [H₃O⁺] = 4.1 × 10^-2 M? A)12.61 B)1.39 C)1.10 D)12.90 E)4.10

Question

Quizplus · Accepted Answer

The presence of [H₃O⁺] indicates that this is a weak acid, and the pH can be calculated using the equation: pH = pKa + log([A-]/[HA]), where pKa is the acid dissociation constant, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the acid. Without knowing the specific acid, we cannot calculate pKa, but we can assume that [A-] = [₃O⁺] and [HA] = [H+], since the acid will be mostly dissociated into H+ and its conjugate base. Plugging in the values given, we get: pH = -log(4.1 × 10^-2) = 1.39. Therefore, the answer is B.

What Is the PH of a Solution in Which [H3O+]

What Is the PH of a Solution in Which [H₃O⁺]