The intercept of the graph (that is, the value of log t05 at log C0 = 0) is 2.60. Thus, from equation (4.23), log[(2 - 1)/k] = 2.60 and k = 2.51 x 10_

The half-life of the reaction is determined for a series of initial drug concentrations, C0, and the order, n, is calculated from the slope of plots of log t05 as a function of log C0.

Determination of the order of

The kinetics of decomposition of a drug in aqueous solution were studied using a series of solutions of different initial drug concentrations, C0. For each solution the time taken for half the drug to decompose (that is, t05) was determined with the following results:

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