Chapter 15, Problem 15.61QP

Interpretation Introduction

Interpretation: The reason corresponding to the $K_{{\text{a}}_2}$ value of phosphoric acid being less than its $K_{{\text{a}}_1}$ value but greater than its $K_{{\text{a}}_3}$ value is to be stated.

Concept introduction: The degree of ionization is the term that is used to express the extent of the number of ions, when the compound dissolves in a solution. The equilibrium constant helps to find out the association between concentration of reaction and product at equilibrium point. The value of equilibrium constant relies upon degree of ionization.

To determine: The reason corresponding to the $K_{{\text{a}}_2}$ value of phosphoric acid being less than its $K_{{\text{a}}_1}$ value but greater than its $K_{{\text{a}}_3}$ value.