On the Reaction between Ammonium Metavanadate and Potassium Hydrogen Sulfate at Different Temperatures

✍ Scribed by M.F.R. Fouda; H.I. Saleh; W.H. Hegazy; E.A. Kishar

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 192 KB
• Volume: 145
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8231

✦ Synopsis

The reaction products resulting from the interaction of ammonium metavanadate and potassium hydrogen sulfate were characterized by chemical and thermal analysis, X-ray di4raction patterns, ligand 5eld spectra, and magnetic susceptibility. The interaction between the two salts was found to start as early as 503C. The identity of the products depends essentially on the temperature and time of reaction in addition to the molar ratio of the reactants. The product compounds were composed, in general, of bronzes and polyvanadates in addition to some tetra-and pentavalent vanadium compounds. The production of tetravalent vanadium compounds may arise via the intervention of diamagnetic dioxovanadium (V) sul5te VO 2 (SO 3 ) 0.5 which is unstable above 2003C and transforms to vanadyl sulfate (VOSO 4 ) which in turn reacts with K 2 SO 4 forming K 2 VO(SO 4 ) 2 .