A 0.632 M solution of a monoprotic base has a pH of 11.53. What is the ionization constant of this base?

Question

Quizplus · Accepted Answer

The pH of 11.53 corresponds to a pOH of 2.47 (since pH + pOH = 14). The concentration of OH⁻ ions is 10^(-2.47) M. Using the formula for Kb, Kb = [OH⁻]² / [Base_initial - OH⁻], and given the initial concentration of the base is 0.632 M, the calculation yields a Kb value close to 1.8 × 10⁻⁵.

A 0632 M Solution of a Monoprotic Base Has a PH