Water activity measurements with single suspended droplets: The NaCl-H 2O and KCl-H 2O systems

The levitation of a single micrometer-sized particle in a controlled water vapor environment is shown to be a novel experimental technique for measuring the thermodynamic properties of concentrated electrolyte solutions. Water activity data are obtained for the aqueous solutions of NaCl and KCl at 2...

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Bibliographic Details
Published inJournal of colloid and interface science Vol. 114; no. 2; pp. 409 - 415
Main Authors Tang, I.N, Munkelwitz, H.R, Wang, Ning
Format Journal Article
LanguageEnglish
Published Elsevier Inc 1986
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Summary:The levitation of a single micrometer-sized particle in a controlled water vapor environment is shown to be a novel experimental technique for measuring the thermodynamic properties of concentrated electrolyte solutions. Water activity data are obtained for the aqueous solutions of NaCl and KCl at 25°C over the entire concentration range up to the critical supersaturation concentration. Empirical constants are derived from a best fit of the data to the extended form of the Debye-Hückel equation.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(86)90426-1