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Water activities, osmotic and activity coefficients in aqueous chloride solutions atT =  298.15 K by the hygrometric method

✍ Scribed by Mohamed El Guendouzi; Abderrahim Dinane; Abdelfetah Mounir

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 206 KB
Volume: 33
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.2000.0815

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✦ Synopsis

Water activities of aqueous electrolyte solutions of HCl(aq), LiCl(aq), NaCl(aq), KCl(aq), CsCl(aq), NH 4 Cl(aq), MgCl 2 (aq), CaCl 2 (aq), and BaCl 2 (aq) have been determined at T = 298.15 K by the hygrometric method, and at molalities ranging from 0.2 mol • kg -1 to saturation. From measurements of droplets diameters of reference NaCl(aq) or LiCl(aq), the dependence of relative humidity on solute concentration was determined. The data on the relative humidities allow the deduction of water activities and the osmotic coefficients at different molalities. Osmotic coefficient data have been described by the ion interaction model of Pitzer. The ion interaction parameters were also determined for each of the studied salts. With these parameters, the solute activity coefficients can be predicted. Our present results have been compared with reported thermodynamic data.

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Water activities, osmotic and activity coefficients in aqueous chloride solutions atT&#xa0;=&#xa0; 298.15 K by the hygrometric method

✦ Synopsis

Water activities, osmotic and activity coefficients in aqueous chloride solutions atT = 298.15 K by the hygrometric method