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Osmotic and activity coefficients of CF3COONa(aq) and CF3COOK(aq) at the temperature 298.15 K

✍ Scribed by Teresa Gampe; Zofia Libuś

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
404 KB
Volume
27
Category
Article
ISSN
0021-9614

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✦ Synopsis

The osmotic and activity coefficients of CF3COONa(aq) and CF3COOK(aq) have been determined at the temperature T=298.15 K by the isopiestic method in the molality range from 0.2 mol•kg -1 to the molalities (47.1 and 58.3) mol•kg -1 , respectively. The results have been analyzed in terms of ion-ion and ion-water interactions and compared with the literature for aqueous CH3COONa, CCl3COONa, and simple inorganic 1-1 salts. The discussion confirmed our hypothesis that the main factor which determines the influence of the 1-1 salts on water activity is the size of the ions. We did not observe any specific influence of hydrophobic groups on the state of water in solution.

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