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Apparent Molal Volumes of Sodium Fluoride in Mixed Aqueous-Ethanol Solvents

Author(s): E. Gomaa | M. Hamada | R. Galal

Journal: Avances en QuĂ­mica
ISSN 1856-5301

Volume: 5;
Issue: 2;
Start page: 117;
Date: 2010;
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Keywords: Apparent molal volumes | partial molal volumes | asymmetric assumption | sodium fluoride.

The densities of different molal concentrations of sodium fluoride at ethanol-water mixtures, as solvent, have been measured over the whole composition range at three different temperatures, 293.15, 303.15 and 313.15oK. From the measured densities, the apparent and limiting molal volumes of the electrolytes have been evaluated. The limiting molal volumes for sodium and fluoride ions were estimated by splitting the ionic contributions as an asymmetric assumption.
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