The investigation described in this thesis has included a study of the kinetics of the exchange of chlorine between chloride and tetrachloroplatinate (II) in aqueous solution. As the case in any exchange study it has been necessary to develop a radioactive tracer technique and separation procedure so that the extent of the exchange could be ascertained. By the determination of the extent of exchange as a function of time, the dependence of the rate of exchange upon a number of concentration variables was demonstrated. It was to be expected that the experimental exchange rate law would elucidate features of the mechanism of the process and the species which were involved
