The exercise presented here is designed for use in an undergraduate
physical chemistry laboratory course. The exercise
could be done by students individually or in groups. Two
4-h laboratory sessions are needed: one for the study of
the ionic strength effect and the other for the study of
the temperature effect. The setup, the experiment, and the
report can be completed in each laboratory session. The
aim of the exercise is to examine the dependence of the rate
of iodide oxidation by iron(III) ions (eq 1) on temperature
and ionic strength and to get more detailed insight into the
reaction mechanism.