The current state of studies on the oxoacidity in alkali metal nitrate
s, sulfates and halides is analysed in terms of the classification pro
posed for oxoacidity reactions (Lux - Flood acid - base interactions).
It is shown that the greater part of the published data dealing with
the homogeneous acid-base equilibria is faulty, since they do not take
into account either levelling of the acid (base) properties by the so
lvent or errors in determination of the stoichiometry of reactions. An
explanation for the substantial scatter of the data on the solubility
of oxides in ionic melts, which largely holds up the research along t
his line, is proposed. Reactions of melts with acidic and basic gaseou
s reagents are considered.