Abstract

An experimental device for the calorimetric measurement of enthalpies of cation-exchange is described, giving the values of these enthalpies for K +/H +, Na +/H +, H +/Li +,K +/Li -,Na +/Li + and K +/Na + exchange systems on Dowex 50W with several degrees of cross-linking. Weak thermal effects of long duration have been found in these exchange processes. The influence of the exchange system and cross-linking of the resin is studied.

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