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Title: | Partial molar volumes of oxalic acid and its salts in water-rich binary aqueous mixtures of methanol |
Authors: | Parmar, M L Guleria, M K |
Keywords: | Solution chemistry;Thermodynamics;Partial molar volumes;Ion-solvent interactions |
Issue Date: | Jun-2009 |
Publisher: | CSIR |
Abstract: | Partial molar volumes of oxalic acid and its salts, viz., ammonium oxalate, sodium oxalate and potassium oxalate, have been determined in different compositions of water-rich binary aqueous mixtures of methanol (3, 6, 9, 12, and 15 wt. percent of methanol) from solution density measurements at 298.15 K and in 3% (w/w) methanol + water at different temperatures. The data have been analysed by using Masson equation and the obtained parameters have been interpreted in terms of ion-solvent and ion-ion interactions. The partial molar volumes vary with temperature as a power series of temperature. Structure making/breaking capacities of the electrolytes have been inferred from the sign of ([∂2φ0v / ∂T2)p, i.e. the second derivative of partial molar volume with respect to temperature at constant pressure. Oxalic acid and its salts act as structure breakers in binary aqueous mixtures of methanol. |
Page(s): | 806-811 |
URI: | http://hdl.handle.net/123456789/4692 |
ISSN: | O975-0975 (Online); 0376-4710 (Print) |
Appears in Collections: | IJC-A Vol.48A(06) [June 2009] |
Files in This Item:
File | Description | Size | Format | |
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IJCA 48A(6) 806-811.pdf | 238.85 kB | Adobe PDF | View/Open |
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