Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 131, Issue -, Pages 29-35Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2006.08.024
Keywords
electrolyte conductivity; chemical model; magnesium sulfate; 1,4-dioxane-water mixtures
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Electric conductivities of diluted magnesium Sulfate solutions in binary mixtures of 1,4-dioxane with water were measured covering a solvent composition range up to 50 wt.% of 1,4-dioxane at temperatures from 5 to 35 degrees C. Evaluation of the limiting molar conductivity Lambda(infinity) and the association constant K-A is based on the chemical model of electrolyte solutions, including short-range forces. From the temperature dependence of the limiting molar conductivities Eyring's enthalpy of activation of charge transport was estimated. The standard Gibbs energy, enthalpy and entropy of the ion-pairing process were calculated from the temperature dependence of the ion-association constants. (C) 2006 Elsevier B.V. All rights reserved.
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