Cryoscopic Studies in Molten Salts. On dissociation state of vanadium pentoxide and some alkali vanadates in molten K 2 Cr 2 O 7  and KNO 3 | Zendy

Hassanein M. | Zendy; Youssef N. S. | Zendy

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Cryoscopic Studies in Molten Salts. On dissociation state of vanadium pentoxide and some alkali vanadates in molten K 2 Cr 2 O 7 and KNO 3

Author(s) -

Hassanein M.,

Youssef N. S.

Publication year - 1978

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.19784420128

Subject(s) - chemistry , alkali metal , vanadium , dissociation (chemistry) , pentoxide , solvent , inorganic chemistry , freezing point , freezing point depression , analytical chemistry (journal) , thermodynamics , chromatography , organic chemistry , physics

The dissociation state of very low concentrations of the following solutes: a — V 2 O 5 , NH 4 VO 3 , KVO 3 , NaV 3 O 8 Na 4 V 2 O 7 , K 4 V 2 O 7 in molten K 2 Cr 2 O 7 and b — NaVo 3 KVO 3 , Na 4 V 2 O 7 , K 4 V 2 O 7 , Na 3 VO 4 in molten KNO 3 was studied cryoscopically. The depression in freezing point was obtained by measuring the corresponding cooling curves. The results with the solvent K 2 Cr 2 O 7 showed that a reaction occured between it and the solutes, which was not a simple one. Generally, heteropolyions such as (CrVo 7 ) 3− , (CrV 2 O 10 ) 4− and (Cr 2 V 3 O 16 ) −5 were probably formed. In case of the the solvent KNO 3 , the results showed that the investigated types of vanadates were dissociated giving the orthobvanadate (VO 4 ) 3− ions.

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