Abstract
Precise densities for sodium of chloride, bromide and iodide and potassium iodide in ethanolamine and water+ethanolamine mixtures (15, 30, 50, 60, 70, 80 and 90 mass% ethanolamine) up to a maximum salt molality of 0.15 mol-kg−1 are reported from measurements at 25°C using a vibrating tube densimeter. The electrolyte apparent molar volumes were calculated and extrapolated to infinite dilution using the Masson equation to yield the limiting electrolyte partial molar volumes. The limiting ionic partial molar volumes V oion were estimated using Mukerjee's method. A correspondence principle proposed earlier for predicting ionic entropies could be used for the estimation of V oion for rubidium and cesium salts. The estimates of the contributions from geometric and the electrostrictive effects to V oion are also reported. The variations in these contributions with the change in solvent composition are discussed in terms of the changes in the solvent structure.
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Wadi, R.K., Kathuria, P. Partial molar volumes of monovalent ions in ethanolamine and water + ethanolamine mixtures at 25°C. J Solution Chem 21, 361–374 (1992). https://doi.org/10.1007/BF00647859
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DOI: https://doi.org/10.1007/BF00647859