Chapter 9, Problem 9.65EP

Interpretation Introduction

Interpretation:

The graph which shows how the concentration of the reactant and products of a reversible reaction varies with time has to be sketched.

Concept Introduction:

Reversible reaction:

Reversible reaction is a chemical reaction in which the convertion of reactants to products(forward reaction) and the conversion of products to reactants(reverse raction) happens simultaneously.

Example:

Consider the reaction,

${\text{H}}_{\text{2}}{\text{+ I}}_{\text{2}}\underset{}{\rightleftharpoons }\text{ 2HI}$

The above recation repreasents a reversible reaction.  The double headed arrow is used to represent the reversible reaction.

Forward reaction is:

    ${\text{H}}_{\text{2}}{\text{ + I}}_{\text{2}}\underset{}{\to }\text{ 2HI}$

Backward reaction is:

    $\text{2HI }\stackrel{}{\to }{\text{ H}}_{\text{2}}{\text{+ I}}_{\text{2}}$

Both the forward and backward reaction occurs simultaneously.