Chapter 16.4, Problem 16.5AFP

Interpretation Introduction

Interpretation: The time taken by change in the concentration of ${\text{PH}}_{\text{3}}$ should be calculated if $\text{0}\text{.150 mol}$ are placed in $\text{2}\text{.0 L}$ container to reach at $\text{0}\text{.042 mol/L}$ . The rate constant at $\text{680 }°\text{C}$ is give as $\text{0}{\text{.0198 s}}^{\text{-1}}$ .

Concept Introduction: The integrated rate equation for first order reaction is:

  $k=\frac{2.303}{t}\log \frac{a}{a-x}$

Where;

  $k$ = rate constant,

  $a$ = initial concentration,

  $a-x$ = concentration after $t$ .