Osmotic and Activity Coefficients of the {xZnCl2 + (1 - x)ZnSO4}(aq) System at 298.15 K [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- PDF-file: 52 pages; size: 3.5 Mbytes
- Additional Creators
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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- Summary
- Isopiestic vapor pressure measurements were made for (xZnCl₂ + (1 - x)ZnSO₄)(aq) solutions with ZnCl₂ molality fractions of x = (0, 0.3062, 0.5730, 0.7969, and 1) at the temperature 298.15 K, using KCl(aq) as the reference standard. These measurements cover the water activity range 0.901-0.919 ≤ a{sub w} ≤ 0.978. The experimental osmotic coefficients were used to evaluate the parameters of an extended ion-interaction (Pitzer) model for these mixed electrolyte solutions. A similar analysis was made of the available activity data for ZnCl₂(aq) at 298.15 K, while assuming the presence of equilibrium amounts of ZnCl⁺(aq) ion-pairs, to derive the ion-interaction parameters for the hypothetical pure binary electrolytes (Zn{sup 2+}, 2Cl⁻) and (ZnCl⁺,Cl⁻). These parameters are required for the analysis of the mixture results. Although significant concentrations of higher-order zinc chloride complexes may also be present in these solutions, it was possible to represent the osmotic coefficients accurately by explicitly including only the predominant complex ZnCl⁺(aq) and the completely dissociated ions. The ionic activity coefficients and osmotic coefficients were calculated over the investigated molality range using the evaluated extended Pitzer model parameters.
- Report Numbers
- E 1.99:ucrl-jrnl-222931
ucrl-jrnl-222931 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
06/27/2006.
"ucrl-jrnl-222931"
Journal of Solution Chemistry, vol. 36, no. 4, April 17, 2007, pp. 405-435 36 4 ISSN 0095-9782; JSLCAG FT
Rard, J A; Todorovic, M; Ninkovic, R; Miladinovic, J; Grujic, S. - Funding Information
- W-7405-ENG-48
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