Vapour pressure studies of simple hydrogen sulphate salts in anhydrous nitric acid at 0°C

Abstract

Vapour pressure studies on solutions of NaHSO4, KHSO4 and NH4HSO4 in anhydrous nitric acid indicate that these solutes give two particles per molecule in solution without reaction and do not suppress the self-dissociation of the solvent. Experiments involving the addition of H2SO4 to solutions of KNO3 and K2SO4 in anhydrous nitric acid support this view. Studies involving the addition of water to solutions of KNO3, NH4NO3, K2SO4 and KHSO4 in nitric acid indicate that hydration of the ions from these salts does not occur in concentrated nitric acid, and the results provide supporting evidence for the high stability of the ions NO3(HNO3)x and HSO4(HNO3)x.