Chapter 7, Problem 7.79P

Interpretation Introduction

Interpretation:

To calculate the equilibrium concentrations of H₂ O when the equilibrium concentrations of H₂ and O₂ are given.

Concept introduction:

The given equilibrium reaction representing the formation of H₂ and O₂ from H₂ O is,

$2{\text{H}}_2\text{O}(\text{l})◰\hspace{1em}2{\text{H}}_2(g)+{\text{O}}_2(g)$

Equilibrium constant, K for this reaction can be determined using the equilibrium molar concentrations of H₂, O₂ and H₂ O as below,

$\text{K=}\frac{{[{\text{H}}_{\text{2}}\text{]}}^2{\text{[O}}_2]}{{{\text{[H}}_2\text{O]}}^2}$.