Chapter 15, Problem 15.83SP

Interpretation Introduction

(a)

Interpretation:

Equilibrium concentration of H atoms at equilibrium, if the equilibrium concentration of H₂ is 0.10 M should be calculated.

Concept introduction:

The equilibrium constant, $K_c$ is the ratio between product of the equilibrium concentrations of the products and the product of equilibrium concentrations of all reactants. All the concentrations are raised to the power of its coefficient in the balanced equation. Equilibrium constant for a particular reaction is always same at a particular temperature.

Equilibrium constant expression

$\begin{array}{l}\text{aA + bB }\rightleftharpoons \text{ cC + dD}\\ K_c=\frac{{\left[C\right]}^c{\left[D\right]}^d}{{\left[A\right]}^a{\left[B\right]}^b}\end{array}$

Interpretation Introduction

(b)

Interpretation:

Number of H atoms and H₂ molecules present in 1.0 L of 0.10 M H₂ at 500 K

Concept introduction:

Avogadro’s number is number of units in one mole of any substance equal to $6.022\times {10}^{23}$. These number of units may be atoms, molecules, ions or electrons etc.