GENERATION OF HYDROGEN IONS AT THE INTERFACE OF CATION-EXCHANGE MEMBRANE AND THE SOLUTION OF MULTI-CHARGED CATIONS IN ELECTRODIALYSIS
In this work the generation of hydrogen ions in solutions of multi-charged cations was study by ion exchange membrane electrodialysis. The pH of solution of cell 5 was measured for the solutions containing sodium, calcium and aluminum chloride passing through cell 4 of the electro-dialyzer to investigate irreversible dissociation of water molecules. And the fluxes of hydrogen ions through cation exchange membrane separating cells 4 and 5 were investigated for each solution. The flux of hydrogen ions in solution containing sodium chloride is higher than that of solutions containing calcium and aluminum chloride. This is because of the retention of water molecules in hydration shell of solutions containing multi- charged cations is stronger than that of solution containing singly charged cation.