Chapter 18, Problem 90A

Interpretation Introduction

Interpretation: The equilibrium constant expression for the given reaction is to be stated.

  ${\text{2SO}}_2\left(\text{g}\right)+{\text{O}}_{\text{2}}\left(\text{g}\right)\rightleftharpoons 2{\text{SO}}_3\left(\text{g}\right)$

Concept Introduction: The ratio of the concentration of products to the concentration of the reactants is called an equilibrium constant. It is represented by $\text{K}\text{or}{\text{K}}_{\text{c}}$ .

Answer to Problem 90A

  $\text{K}=\frac{{\left[{\text{SO}}_3\right]}^2}{{\left[{\text{SO}}_2\right]}^{\text{2}}\left[{\text{O}}_2\right]}$

Explanation of Solution

The given reaction is;

  ${\text{2SO}}_2\left(\text{g}\right)+{\text{O}}_{\text{2}}\left(\text{g}\right)\rightleftharpoons 2{\text{SO}}_3\left(\text{g}\right)$

Thus, the equilibrium constant expression for the above reaction is represented as;

  $\text{K}=\frac{{\left[{\text{SO}}_3\right]}^2}{{\left[{\text{SO}}_2\right]}^{\text{2}}\left[{\text{O}}_2\right]}$