www.oup.com

Atkins & de Paula:
Physical Chemistry for the Life Sciences

Living graph logo
Atkins & De Paula: Physical Chemistry for the Life Sciences
LIVING GRAPHS
Living graphs homepage
Consecutive first-order reactions 7.6

The concentrations of the substances involved in a consecutive reaction of the form A -> I -> P, where I is an intermediate and P a product are given by

Where A0 is initial concentration of reactant A (mol L-1), t is time (s), and k1 and k2 are rate constants (s-1).

Note how, at each time, the sum of the three concentrations is a constant.

To graph the concentration of the reactants enter the parameters (i.e., A0, k1, k2) and hit New Plot. The Clear button will remove all plots. To see the parameters for each plot hit the Legend on/off button. The Redraw button will refresh the graph. This is useful when the function domain (i.e., t ) has been changed. To see the value of each plot at a given point, move your cursor to the desired location then click and hold.

Copyright © Oxford University Press 2005. All rights reserved. Legal Statement.