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Electrical conductivity of molten calcium nitrate and calcium chloride hydrates

J. Novák, I. Sláma, and Z. Kodejš

Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 250 6S Řež near Prague


Abstract: The temp. and Ca2+ concn. dependence of the equiv. cond. Λ was studied in the system CaCl2-Ca(NO3)2-H2O at ionic fraction yCl- = [Cl-]/([Cl-] + [NO3-]) ≃ 0.2. The temp. dependence is described either by the Arrhenius, Vogel, Vogel-Tammann-Fulcher equations, or the 2nd degree polynomial in the form ln Λ = A + BT + CT2. It is shown that the Arrhenius equation is unsuitable to describe the Λ = f(T) dependence in the temp. interval studied (293-353 K). The other equations describe behavior of the system with the sufficient accuracy. The concn. dependence of the cond. satisfies the relation ln Λ = a + bxCa + cxCa2 + dxCa3 (xCa denotes mole fraction of Ca) in the interval of xCa from 0.05 to 0.20. The comparison is being made also between the presently studied system and the system with yCl- ≃ 0.1.

Full paper in Portable Document Format: 311a29.pdf


Chemical Papers 31 (1) 29–37 (1977)

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