
%0 Journal Article
%A Fredericks, M 
%A Temple, RB 
%T The behaviour of several oxoanions dissolved in molten alkali-metal nitrates
%J Australian Journal of Chemistry
%D 1972/11/01
%V 25
%N 11
%P 2319-2327
%K 
%R https://doi.org/10.1071/CH9722319
%U https://www.publish.csiro.au/paper/CH9722319 
%X The behaviour of several oxoanions (HSO4-, HSO3-, NO2-, ClO4-, ClO3-, SO42-, SO32-) dissolved in a molten NaNO3-KNO3 eutectic at 300°C was studied by means of an oxygen electrode.   NaHSO4 and NaHSO3 were found to decompose very rapidly to form S2O72- or S2O52-, and water. NO2-, SO42-, and SO32- were found to dissociate to a measurable extent to form O2- and the equilibrium constants were determined for these dissociations. SO42- and SO32- appear to dissociate according to the equations     SO42- &#8592;&#8594; SO3 + O2    And    SO32- &#8592;&#8594; SO2 + O2    in which SO3 and SO2 remain solvated in the melt under the conditions used. ClO4- was found to be completely stable in the melt, but ClO3- appears to form an adduct with O2-. Tentatively assuming that the reaction is     ClO3- + O2-&#8592;&#8594; ClO43-  we have found the equilibrium constant to be 3.57 x 103. 
