Chapter 18, Problem 18.23P

(a)

Interpretation Introduction

Interpretation:

The catalysts for the reaction have to be identified.

Concept Introduction:

Properties of catalysts:

Catalysts provide a lower energy pathway by decreasing activation energy.  They are not consumed by the reaction.  They do not change the final amounts of reactants and products produced.

(b)

Interpretation Introduction

Interpretation:

The overall order of the reaction has to be determined.

Concept Introduction:

Rate law or rate equation: The relationship between the reactant concentrations and reaction rate is expressed by an equation.

  $\begin{array}{l}\text{aA + bB}\to x\text{X}\\ \\ {\text{Rate of reaction = k [A]}}^{\text{m}}{\text{[B]}}^{\text{n}}\\ \\ \text{Total}\text{order}\text{of reaction = }\left(\text{m + n}\right).\end{array}$

Order of a reaction: The order of a reaction with respect to a particular reactant is the exponent of its concentration term in the rate law expression, and the overall reaction order is the sum of the exponents on all concentration terms.

(c)

Interpretation Introduction

Interpretation:

The concentration of $H_2{O}_2$, $H^{+}$ and $B{r}^{-}$ as a function of time has to be sketched.

Concept Introduction:

Refer to part (a).