Fig 7B.6 - Test for a Second Order Reaction
(and Time Dependence)

The variation with time of the concentration of a reactant in a second-order reaction is given by

Where [A]₀ is the initial concentration of reactant (mol·L^-1), t is time (s), and k_r is the rate constant (L·mol^-1·s^-1). Taking the inverse of each side of this equation gives

where k_r is the slope, and 1/[A]₀ is the intercept, of the best fit line.

To calculate the rate constant enter data pairs (t, [A]_t) in the appropriate units, and then click the Update button. To see a value on the graph, move your cursor to the desired location then click.