Studies in Ion-exchange Equilibria. Part II. Exchange of Univalent Anions on Amberlite IR-4B and Amberlite IRA-4I0

The equilibrium studies have been performed on a weakly basic anion exchanger (Amberlite 1R-4B) and a strongly basic anion exchanger (Amberlite 1RA-410) in hydroxyl form with univalent anions (F^-, Cl^-, Br^-, I^-, and NO₃^-). The variation of apparent equilibrium constant with the concentration of the external solution and hence with the equivalent fraction of the ion in the resin phase (X_BR) has been shown to be irregular.