Volumetric properties of aqueous electrolytes at high temperature. III. B(OH)3?NaBx(OH)3x+1?NaOH mixtures up to 523 K

Autor:	Hugo Bianchi, Jorge G. Ganopolsky, Horacio R. Corti
Rok vydání:	1996
Předmět:	Aqueous solution Inorganic chemistry Biophysics Concentration effect Partial molar property Biochemistry Dilution Boric acid chemistry.chemical_compound Molar volume chemistry Sodium hydroxide Pitzer equations Physical and Theoretical Chemistry Molecular Biology
Zdroj:	Journal of Solution Chemistry. 25:391-399
ISSN:	1572-8927 0095-9782
DOI:	10.1007/bf00972894
Popis:	The densities of aqueous solutions resulting from the partial neutralization of boric acid with sodium hydroxide were measured as a function of concentration, between 375 K and 523 K at pressures close to saturation. The speciation in this system is complex, di- and triborate ions are present in addition to the monoborate ion. The concentration dependence of the apparent partial molar volume of the mixture can be described using the Pitzer equation only if the formation of the polyborate species in the concentrated solutions is taken into account. The partial molar volumes at infinite dilution for the diborate and triborate anions, obtained by assuming ideal mixing, are reported in the range of temperature studied.
Databáze:	OpenAIRE
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