Chapter 17, Problem 17A.4BE

Interpretation Introduction

Interpretation:

The rate of formation of B in the reaction $\text{A + 3B }\stackrel{}{\to }\text{ C + 2D}$ is $\text{2}{\text{.7 moldm}}^{\text{-3}}{\text{s}}^{\text{-1}}$.  The reaction rate and rates of formation or consumption of A, B and D 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,

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