Étude d'équilibres en solution à l'aide des échangeurs d'ions: II Détermination des constantes de dissociation des perchlorates alcalins dans les mélanges eau—acide acétique—acide perchlorique

The thermodynamic dissociation constants of lithium, sodium, potassium, rubidium and cesium perchlorates in water—acetic acid—perchloric acid mixtures have been determined by an ion-exchange method. The distribution coefficients of alkaline elements have been measured in water—acetic acid—perchloric acid mixtures containing a variable quantity of water (4–100 % by weight) and a constant amount of perchloric acid. The variation of these distribution coefficients with perchloric acid concentration has been studied in various mixtures containing a constant amount of water (less than 20 % $\text{w}\text{w}$). The results have been used to determine the dissociation constants of alkaline perchlorates and the selectivity coefficients of alkaline ions and hydrogen ion in the aqueous organic mixtures studied.