An equilibrium reaction of the formula HA ⇌ H⁺ + A^- has an equilibrium constant of 13.5 and a [H⁺] = 0.500 M. What is the value of [HA]?

Question

Quizplus · Accepted Answer

Given the equilibrium constant (K) is 13.5 and [H⁺] = 0.500 M, and assuming initial concentrations of products are zero, the change in concentration of HA will be equal to the concentration of H⁺ at equilibrium. Thus, K = [H⁺]^2 / [HA], solving for [HA] gives 0.018 M.

An Equilibrium Reaction of the Formula HA ⇌ H+

An Equilibrium Reaction of the Formula HA ⇌ H⁺