Accession Number : ADD095183

Title :   Evaluated Activity and Osmotic Coefficients for Aqueous Solutions: Thirty-Six Uni-Bivalent Electrolytes,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Goldberg, R N

Report Date : Jan 1981

Pagination or Media Count : 99

Abstract : A critical evaluation of the mean activity and osmotic coefficients in aqueous solutions of thirty-six uni-bivalent electrolytes at 298.15 K is presented. The systems which have been treated are ammonium orthophosphate, guanadinium carbonate 1.2-ethane disulfonic acid, m-benzene disulfonic acid, ammonium decahydroborate, and the uni-bivalent compounds of lithium, sodium, potassium, rubidium, and cesium. Osmotic coefficients were calculated from direct vapor pressure measurements, from isopiestic measurements and from freezing-point depression measurements. Activity coefficients were calculated from electromotive force measurements on galvanic cells without transference and from diffusion measurements. Given are empirical coefficients for three different correlating equations, obtained by a weighted least squares fit to the experimental data, and tables consisting of the activity coefficients of the compounds, the osmotic coefficients and activity of water, and the excess Gibbs energy of the solution as functions of the molality for each electrolyte system. The literature coverage is through the computerized version of Chemical Abstracts of September 1979. (Author)

Descriptors :   *ELECTROLYTES, *SOLUTIONS(MIXTURES), *OSMOSIS, *DIFFUSION COEFFICIENT, AMMONIUM COMPOUNDS, PHOSPHATES, HYDROGEN COMPOUNDS, BORATES, GUANIDINES, CARBONATES, SULFONIC ACIDS, LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CESIUM, MEASUREMENT, THERMODYNAMIC PROPERTIES, FREE ENERGY, EXPERIMENTAL DATA, TABLES(DATA)

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE