Cryoscopy in Solvents with Dystectic Melting

Proks, I., Daněk, V., Chrenková, M., Šimko, F. and Pánek, Z. Cryoscopy in Solvents with Dystectic Melting Chemical Papers, Vol.56, No. 2, 2002, 71-76

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Proks, I.
Daněk, V.
Chrenková, M.
Šimko, F.
Pánek, Z.
Title Cryoscopy in Solvents with Dystectic Melting
Journal name Chemical Papers
Publication date 2002
Year available 2002
Volume number 56
Issue number 2
ISSN 0366-6352
Start page 71
End page 76
Place of publication Poland
Publisher Versita
Collection year 2002
Language english
Subject 250000 Chemical Sciences
250200 Inorganic Chemistry
Abstract/Summary Theoretical derivation of relations valid for cryoscopic measurements in solvents with dystectic mode of melting, i.e. solvents, which undergo at melting a more or less extended thermal dissociation, when chemical reaction between solvent and solute takes place, is presented. When one of the products of this chemical reaction is identical with the product of thermal dissociation of the solvent, the problem of defining the number of “foreign” substances, originating in the reaction between the solvent and the admixture arises. The presented approach shows that the partially dissociated solvent cannot distinguish originating own dissociation products as foreign substances, which made it easier to determine the nature of the probable chemical reaction. The presented approach is applied in the systems Na3AlF6—Al2O3, Na3AlF6—Fe2O3, and Na3AlF6—Al(PO3)3, which are of great importance in the fundamentals of aluminium electrolysis.
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