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MIXED SALT ELECTROLYTE SOLUTIONS: ACCURATE CORRELATION FOR OSMOTIC COEFFICIENTS BASED ON MOLECULAR DISTRIBUTION FUNCTIONS (MEAN SPHERICAL APPROXIMATION, RADIAL, THERMODYNAMIC PROPERTIES)

Posted on:1986-05-18Degree:Ph.DType:Dissertation
University:The University of OklahomaCandidate:LANDIS, LESTER HENRY, JRFull Text:PDF
GTID:1470390017460550Subject:Engineering
Abstract/Summary:
A molecular distribution theory, based on the EXP modification of the Mean Spherical Approximation, is used to accurately predict the osmotic coefficients of electrolyte solutions. The theory is tested for ninety single salts, thirty two-salt mixtures, and four three-salt mixtures including 1:1, 2:1, 3:1, 1:2 and 2:2 valence types. The results demonstrate that the nonideal behavior of electrolyte solutions can be attributed to at least two of the fundamental molecular contributions: electrostatic interactions and finite ion size. Predictions from the theory are accurate to concentrations as high as saturation in many cases and as high as available experimental data in other cases. The size parameters determined from pure salts are used to predict osmotic coefficients of salt mixtures without introducing additional interaction parameters. The consistent treatment of the ion size parameters insures the consistent treatment of ions in salt mixtures.
Keywords/Search Tags:Electrolyte solutions, Osmotic coefficients, Salt, Molecular, Mixtures
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