Chapter 17, Problem 17A.3AE

Interpretation Introduction

Interpretation:

The rate of the reaction $\text{A + 2B }\stackrel{}{\to }\text{ 3C + D}$ was reported as $\text{2}{\text{.7 moldm}}^{\text{-3}}{\text{s}}^{\text{-1}}$. The rates of formation and consumption of participants has to be stated.

Concept Introduction:

Rate of a reaction:

Rate of a reaction is the change in concentration of reactant or product per unit time.  It is expressed in terms of decrease in concentration of any of the reactants and increase in concentration of any of the products.

Rate of formation $\text{=}$ Rate of consumption

Considering a reaction:

    $\text{2A + B }\stackrel{}{\to }\text{ 3C + D}$

Then,

  $\text{-}\frac{\text{1}}{\text{2}}\frac{\text{d[A]}}{\text{dt}}\text{ = -}\frac{\text{d[B]}}{\text{dt}}\text{ = }\frac{\text{1}}{\text{3}}\frac{\text{d[C]}}{\text{dt}}\text{ = }\frac{\text{d[D]}}{\text{dt}}$