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Determination of water activities, osmotic and activity coefficients in aqueous solutions using the hygrometric method

โœ Scribed by Mohamed El Guendouzi; Abderrahim Dinane

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
250 KB
Volume
32
Category
Article
ISSN
0021-9614

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โœฆ Synopsis

In the present study we use the hygrometric method for the determination of relative humidities of aqueous electrolyte solutions. The relative humidities of KCl(aq), Na 2 SO 4 (aq), and NaNO 3 (aq) have been measured for different molalities and at temperatures from (278.15 to 323.15) K. The data on the relative humidities allow the deduction of the water activities and the osmotic coefficients at the temperature of 298.15 K. The solute activity coefficients are also determined for the three salts using Pitzer's model. The results obtained by this method are compared with those found in the literature.

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