Representation of Electrical Conductances for Polyvalent Electrolytes by the Quint-Viallard Conductivity Equation. Part 1. Symmetrical 2:2 Type Electrolytes. Dilute Aqueous Solutions of Alkaline Earth Metal Sulfates and Transition Metal Sulfates |
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Authors: | Alexander Apelblat |
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Institution: | (1) Department of Chemical Engineering, Ben Gurion University of the Negev, Beer Sheva, 84105, Israel |
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Abstract: | Literature values of the electrical conductivities of dilute aqueous solutions of alkaline metal sulfates (BeSO4, MgSO4, CaSO4, SrSO4) and of transition metal sulfates (MnSO4, FeSO4, CoSO4, NiSO4, CuSO4, ZnSO4, CdSO4) were reexamined within the framework of the Quint-Viallard conductivity equations in order to obtain a uniform representation
of conductivities. It was observed that the limiting conductances of electrolytes at infinite dilution are very similar irrespective
of the applied conductivity equation, whereas the derived ion association equilibrium constants vary considerably. The ion
association equilibrium constants are therefore of doubtful physical value and should be treated rather as just fitting parameters. |
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