Chapter 12, Problem 12.120CHP

(a)

Interpretation Introduction

Interpretation:

The rate laws for the forward and backward reactions has to be given.

Concept Introduction:

Rate law of a reaction:

It is an equation that related to the dependence of the reaction rate on the concentration of each substrates (reactants).

$\begin{array}{l}\text{For}\text{a}\text{reaction}\\ \\ \text{aA}\text{+}\text{bB}\stackrel{}{\to }\text{Products}\\ \\ \text{A}\text{and}\text{B}\text{are}\text{reactants}\text{and}\text{a}\text{and}\text{b}\text{are}\text{stoichiometric}\text{coefficients}\text{.}\\ \\ \text{Rate}\text{=}\text{-}\frac{\text{Δ}\left[\text{A}\right]}{\text{Δt}}\text{=}\text{k}{\left[\text{A}\right]}^{\text{m}}{\left[\text{B}\right]}^{\text{n}}\\ \\ \text{where,}\text{k}\text{-}\text{rate}\text{constant}\text{.}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The qualitative graph that shows the rate of forward and backward reactions vary with time has to be drawn.

(c)

Interpretation Introduction

Interpretation:

The relative concentrations of B and A has to be calculated when the rates of forward and backward reactions become equal.

Concept Introduction:

Rate law of a reaction:

It is an equation that related to the dependence of the reaction rate on the concentration of each substrates (reactants).

$\begin{array}{l}\text{For}\text{a}\text{reaction}\\ \\ \text{aA}\text{+}\text{bB}\stackrel{}{\to }\text{Products}\\ \\ \text{A}\text{and}\text{B}\text{are}\text{reactants}\text{and}\text{a}\text{and}\text{b}\text{are}\text{stoichiometric}\text{coefficients}\text{.}\\ \\ \text{Rate}\text{=}\text{-}\frac{\text{Δ}\left[\text{A}\right]}{\text{Δt}}\text{=}\text{k}{\left[\text{A}\right]}^{\text{m}}{\left[\text{B}\right]}^{\text{n}}\\ \\ \text{where,}\text{k}\text{-}\text{rate}\text{constant}\text{.}\end{array}$