Chapter 17, Problem 57A

Interpretation Introduction

Interpretation:

By dissolving some chlorine gas to the reaction at equilibrium, the change in equilibrium needs to be explained.

Concept introduction:

There is no variation in concentrations of reactants and products with time in the equilibrium state.

Answer to Problem 57A

When more chlorine gas is dissolved then the equilibrium shifts in the backward direction forming more reactants.

Explanation of Solution

Then given reaction is

${\text{PCl}}_{\text{5}}\left(\text{g}\right)\rightleftharpoons {\text{PCl}}_{\text{3}}\left(\text{g}\right){\text{+Cl}}_{\text{2}}\left(\text{g}\right)$

When more chlorine gas is dissolved, the equilibrium shifts in the backward direction forming more reactants to attains the equilibrium state.

Conclusion

When more chlorine gas is dissolved then the equilibrium shifts in the backward direction forming more reactants.