Chapter 14, Problem 14.106SP

Interpretation Introduction

(a)

Interpretation:

The equation for the overall reaction of the following reaction mechanism of hydrogen and iodine monochloride needs to be determined.

$\begin{array}{l}Step1.{\text{H}}_{\text{2}}\left(\text{g}\right)+\text{ICl}\left(\text{g}\right)\to \text{HI}\left(\text{g}\right)+\text{HCl}\left(\text{g}\right)\\ Step2.\text{HI}\left(\text{g}\right)+\text{ICl}\left(\text{g}\right)\to {\text{I}}_{\text{2}}\left(\text{g}\right)+\text{HCl}\left(\text{g}\right)\end{array}$

Concept introduction:

Every reaction occurs via the reaction mechanism, which is a description of what occurs during a chemical reaction in a stepwise manner on a molecular level. Each step of the reaction mechanism is an elementary reaction and the sum of these elementary reactions gives an overall reaction equation.

Interpretation Introduction

(b)

Interpretation:

The reaction intermediate/s for the overall reaction needs to be determined.

Concept introduction:

A reaction intermediate is not present in the overall reaction. It is present in the reactions involved in the mechanism steps but gets canceled out in the overall reaction.

Interpretation Introduction

(c)

Interpretation:

The molecularity of each elementary reaction of hydrogen and iodine monochloride needs to be determined.

Concept introduction:

Molecularity is defined as the number of ions or molecules participate in the rate-determining reaction.