Study of Temperature Effect on Uni-Univalent/Bivalent Ion Exchange Reaction

Abstract

Ion exchange equilibrium constant (K) for Cl ^-/Br ^- and
Cl^-/C₂O₄^2-  systems was studied at different temperatures from 30 to
45°C. For both uni-univalent and uni-bivalent exchange systems,
the value of K increases with rise in temperature. i.e .,  from 1.16 at
30^oC  to 2.95 at 45°C for Cl^-/Br^- system and 19.5 at 30°C to 30.0
at 45°C for Cl^-/C₂O₄^2-  system indicating the endothermic ion exchange
reaction. The difference in K values at the same temperature
for the two systems was related to the ionic charge of exchangeable
ions in the solution.