Chapter 11, Problem 24QRT

(a)

Interpretation Introduction

Interpretation:

The initial rate at which the methyl acetate is converted to products when both reactants, $C{H}_{3}COOC{H}_{3}andO{H}^{-}$, have a concentration of $0.025M$ has to be calculated.

Concept Introduction:

The relationship between rate and initial concentration of reactant is described by rate law.  It is an experimentally determined equation and cannot be found out theoretically from the stoichiometry of the reactants and products.

  $rate=k{\left[concentrationofthereac\tan t\right]}^m$

Where, , $k$ is the rate constant and $m$ is the order of the reaction.

(b)

Interpretation Introduction

Interpretation:

The rate at which methyl alcohol $C{H}_{3}OH$ initially appears in the solution has to be calculated.

Concept Introduction:

Consider the following reaction.

  $aA+bB\to cC$

Where $A$ and $B$ are reactants and $C$ is the product. a, b and c are stoichiometric co-efficient of A, B and C.

  $rate=-\frac{1}{a}\frac{\Delta \left[A\right]}{\Delta t}=-\frac{1}{b}\frac{\Delta \left[B\right]}{\Delta t}=\frac{1}{c}\frac{\Delta \left[C\right]}{\Delta t}$

Where,

    $-\frac{\Delta \left[A\right]}{\Delta t}=$ rate of disappearance of A

    $-\frac{\Delta \left[B\right]}{\Delta t}=$ rate of disappearance of B

    $\frac{\Delta \left[C\right]}{\Delta t}=$ rate of appearance of C

Rate of the reaction can be expressed in terms of change in concentration of reactant and products by multiplying the reciprocal of the corresponding stoichiometric co-efficient to that.