Solutions in selenic acid. Part 9. Higher acids of selenic acid; the SeO3–H2SeO4system

Autor:	Hussein M. Zeidan, M. M. Nour, Mohammed A. Hussein, Saad Wasif, George Iskander
Rok vydání:	1982
Předmět:	chemistry.chemical_compound Chemistry Inorganic chemistry Selenic acid General Chemistry Acidity function Value (mathematics) Freezing point
Zdroj:	J. Chem. Soc., Dalton Trans.. :1645-1648
ISSN:	1364-5447 0300-9246
DOI:	10.1039/dt9820001645
Popis:	The SeO3–H2SeO4 system has been studied cryoscopically. A maximum freezing point of 18.84 ± 0.01 °C indicated the existence of diselenic acid H2Se2O7. Self-dissociation in diselenic acid is discussed and the presence of triselenic acid is predicted. The acidity function (HO) of SeO3–H2SeO4 solutions increases with progressive increase of SeO3 content and a value of –12.77 is reported for 68% SeO3 solution.
Databáze:	OpenAIRE
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