Chapter 11, Problem 81QRT

Interpretation Introduction

Interpretation:

The factor at which the rate of an enzyme catalyzed reaction changes when the substrate concentration is changed from $1.5\times {10}^{-2}Mto4.5\times {10}^{-2}M.$

Concept Introduction:

Catalysts are the substances that alter the rate of chemical reactions by providing an alternative pathway where the activation energy is low compared to the uncatalyzed reaction.  Enzymes are called biological catalysts.  Since, they catalyze the biological reactions.

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.

For a zeroth order kinetics rate can be expressed as follows,

    $rate=k$

Where, $k$ is the first order rate constant.