Abstract
Precise vapor pressure data for solutions of NaCl, NaBr, NaI, NaClO4, KBr, KI, RbI, and CsI in methanol at 25°C in the concentration range 0.02≤m (mol-kg−1)≤0.7 are communicated and discussed. Measurements were carried out by procedures and equipment known to produce data of high precision. Polynomials of fourth degree in molalities are given for the vapor pressure of methanol solutions which can be used for calculating precise reference values as needed in indirect methods. Osmotic coefficients were calculated by taking into account the second virial coefficient of methanol vapor. Discussion of the data is based on the chemical model of electrolyte solutions taking into account short range interactions. Ion-pair association constants are compared to those of conductance measurements.
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Barthel, J., Neueder, R. & Lauermann, G. Vapor pressures of non-aqueous electrolyte solutions. Part 1. Alkali metal salts in methanol. J Solution Chem 14, 621–633 (1985). https://doi.org/10.1007/BF00646055
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DOI: https://doi.org/10.1007/BF00646055