Chapter 12, Problem 85AE

Interpretation Introduction

Interpretation: The equilibrium constant value for a decomposition reaction of ${\text{PCl}}_{\text{5}}$ is given. The concentration of ${\text{PCl}}_{\text{5}}$ is given to be twice the concentration of ${\text{PCl}}_3$. The concentration of ${\text{Cl}}_{\text{2}}$ is to be calculated.

Concept introduction: The state when the reactants involved in a chemical reaction and the products formed in the reaction exist in concentrations having no further tendency to change is known as an equilibrium state of the reaction. When the equilibrium constant is expressed in terms of concentration, it is represented $K$.

To determine: The concentration of ${\text{Cl}}_{\text{2}}$ under the given conditions.