Salt cryoscopy: the depression of the sodium sulphate decahydrate transition temperature by dissolved solutes

Abstract

The theory of the effect of ionic solutes on the sodium sulphate decahydrate transition temperature is discussed and new experimental results are reported. No evidence has been found for behaviour contrary to theoretical predictions, but it was not possible to achieve an experimental precision comparable with that for conventional aqueous cryoscopy. The experimental and interpretative limitations of the technique are discussed.