Chapter 12.7, Problem 12.15P

(a)

Interpretation Introduction

Interpretation:

For the decomposition reaction of hydrogen iodide, the order of the reaction has to be calculated.

Concept Introduction:

Order of a reaction:

Order of a reaction is defined as the sum of exponents of the concentrations in the rate law of the given reaction.

(b)

Interpretation Introduction

Interpretation:

For the decomposition reaction of hydrogen iodide, the rate constant value for consumption of $\text{HI}$ has to be calculated.

Concept Introduction:

Rate of reaction:

The rate of a reaction is defined by the change in concentration of substrate (reactant) or target (product) with change in time.

$\text{Rate}\text{=}\frac{\text{Concentration}\text{change}\left(\text{in}\text{reactant}\text{or}\text{product}\right)}{\text{Time}\text{change}}$

(c)

Interpretation Introduction

Interpretation:

The time required to reach the $\text{HI}$ concentration of $\text{0}\text{.100}\text{M}$ has to be calculated.

(d)

Interpretation Introduction

Interpretation:

The time required to drop the $\text{HI}$ concentration from $\text{0}\text{.400 M to 0}\text{.200 M}$ has to be calculated.

Concept Introduction:

Half-life period:

It is the time required for the reactant (substrate) concentration reduces to one-half of its initial concentration.