Most of the information about reaction mechanism comes from chemical kinetics. This chapter first summarizes some of the basic terms related to the kinetic study of chemical reactions, and discusses some examples of chemical reactions in solution, classified according to their reaction order.

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One of the important sets of parameters obtained from kinetic studies of chemical reactions are the activation parameters, which indicate the energetic requirements of the reaction. The chapter illustrates the power of chemical kinetics in probing reaction mechanism.

There are many questions that must be answered before an experimental approach can be selected to obtain kinetic data. The crucial aspects are the reaction timescale, the stability of the reactants and the range of temperature. The chapter describes the common experimental techniques and detection methods, classified according to the application. It discusses methods for the determination of the reaction order and methods for the determination of reaction kinetics. 1 Introduction and Scope Most of the information about reaction mechanism came and still comes from chemical kinetics; therefore, all science students have had contact with the subject.

While there are many excellent textbooks on the theory of chemical kinetics, the information on practical kinetics in solution is disperse in the literature; only those with some experience can find the information sought. The need for a concise text on practical kinetics has become critical in view of the universal use of computers in teaching and research.

Thanks to this fact, data acquisition and subsequent calculations have become somewhat “boring” routine. Consequently, it is sometimes tempting to fall into the “black‐box trap”: push buttons in order to mix the reagents, acquire the experimental data, and carry out the calculations.

The problem is that, due to several experimental pitfalls, for example, not paying attention to the quality of the data acquired; poor control of reaction conditions; using software without understanding how it works, one may end up with rate constants that appear to be in order if examined for a single run. The problem may appear later, however, when the data from several runs are examined collectively, for example, the dependence of observed rate constant, k obs, on [catalyst], or log k 2 (second‐order rate constant) on 1/ T may show scatter. The person feels frustrated; rightly so. We wrote the present overview with this background in mind. After listing the equations that describe simple and complex reactions, we address the question of obtaining quality kinetic data, first by describing the advantages and limitations of the techniques most frequently employed in chemical kinetics and how to analyze properly the data obtained.

Drawing on practical experience, we considered some of the common pitfalls in kinetics, both in setting up the experiment and in performing the subsequent calculations. This concise account should be helpful to neophytes or occasional users of chemical kinetics, as well as those who need to refresh/update their information on the subject. We have limited our discussion to reactions in solution.