Chapter 15, Problem 104E

Interpretation Introduction

Interpretation: The mass of ${\text{NH}}_{\text{3}}$ in the container is to be calculated.

Concept Introduction: The ratio of concentration of products raised to their stoichiometric coefficients to the ratio of concentration of reactants raised to their stoichiometric coefficients is termed as equilibrium constant $\left(K_{\text{eq}}\right)$

For general chemical equation, that is, $a\text{A}+b\text{B}\rightleftarrows c\text{C}+d\text{D}$, the expression of $K_{\text{eq}}$ is:

$K_{\text{eq}}=\frac{{\left[\text{C}\right]}^c{\left[\text{D}\right]}^d}{{\left[\text{A}\right]}^a{\left[\text{B}\right]}^b}$

Here, $\text{A \& B}$ are reactants and $\text{C \& D}$ are products and $a,b,c,d$ are the respective Stoichiometric coefficients.

In the chemical reaction, the concentration of pure liquid and solid does not change which means that the reactants and products with solid or liquid phase are not included in the equilibrium expression.