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.