Chapter 18, Problem 78E

Interpretation Introduction

Interpretation:

The equilibrium constant $\text{K}$ for the reaction ${\text{PCl}}_{\text{3}}\left(\text{g}\right)+{\text{Cl}}_{\text{2}}\left(\text{g}\right)\rightleftharpoons {\text{PCl}}_{\text{5}}\left(\text{g}\right)$ is to be calculated.

Concept introduction:

The acids that do not undergo complete dissociation when dissolved in water are known as weak acids. The equilibrium constant in the case of dissociation of a weak acid is known as the acid constant and is denoted by ${\text{K}}_{\text{a}}$.