On The Effect of Ionic Melt Compositions on Their Acid-base Properties

Analysis of the ionic solvent effect on acid-base equilibria allowed to divide them in two types distinguishing by the existence of ‘inner’ acid-base equilibrium and, consequently, by type of acid-base intervals. A consideration of some studies of ionic melts on the base of mixtures of AlCl3 and gallium halides with alkaline halides showed that the effect of melt composition (both cation and anion) on acid-base interval extent is described in the frames of ‘hard’ and ‘soft’ acids and bases (Pearson). Oxobasicity indices of molten mixtures containing alkaline and alkaline earth chlorides at 600 and 700°C are determined, the features of oxoacidity it certain melts are discussed.