Chapter 11, Problem 11QRT

(a)

Interpretation Introduction

Interpretation:

A graph of concentration as a function of time has to be drawn.  The shape of the curve has to be described and should be compared with the given figure.

(b)

Interpretation Introduction

Interpretation:

The rate of change of concentration of phenylacetate during the period from $0.20\min to0.40\min$, and then during the period from $1.2\min to1.4\min$ has to be calculated.  The corresponding values have to be compared.

Concept Introduction:

The average rate for a time interval can be calculated as given below.

  $\begin{array}{c}Rate=\frac{-\Delta \left[\text{Reactant}\right]}{\Delta t}\\ \\ =\frac{-\left({\left[\text{Reactant}\right]}_{final}-{\left[\text{Reactant}\right]}_{initial}\right)}{t_{final}-t_{initial}}\\ \\ Rate=\frac{\left({\left[\text{Reactant}\right]}_{initial}-{\left[\text{Reactant}\right]}_{final}\right)}{t_{final}-t_{initial}}\end{array}$

(c)

Interpretation Introduction

Interpretation:

The rate of change of concentration of phenol during the period from $1.00\min to1.25\min$ has to be calculated.