The thermodynamic properties of sulphonated polystyrene exchanges saturated with a single cation

Abstract

If an ion exchanger is treated as if it were an aqueous electrolyte, it is possible to use several independent experimental data to calculate the osmotic and activity coefficients of the resin phase. Illustrative examples are quoted. The activity coefficient of pure sodium " resinate " is calculated with satisfactory agreement from isopiestic data, and by two methods from the sodium-hydrogen exchange reaction. Activity coefficient curves for lithium, sodium, potassium, rubidium, caesium, copper, and barium " resinates " are given and also activity coefficient data for a number of other divalent cationic " resinates ", at a single value of the ionic strength. These activity coefficients show similar trends to those of aqueous electrolytes.