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Freezing points and related properties of electrolyte solutions. III. The systems NaCl−CaCl2−H2O and NaCl−BaCl2−H2O

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Abstract

The freezing temperatures of aqueous calcium chloride and barium chloride and their mixtures with sodium chloride were measured at equivalent molalities of 0.1 to 1.5 mole-kg−1. Osmotic and activity coefficients of the mixtures were calculated at the freezing points of the mixtures. From the freezing points and calorimetric enthalpies of mixing of sodium chloride-magnesium chloride solutions, osmotic and activity coefficients were calculated at 298°K. Agreement of the calculated properties with isopiestic and electrochemical measurements at 298°K is excellent.

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Gibbard, H.F., Fong, S. Freezing points and related properties of electrolyte solutions. III. The systems NaCl−CaCl2−H2O and NaCl−BaCl2−H2O. J Solution Chem 4, 863–872 (1975). https://doi.org/10.1007/BF00649878

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Key Words

  • Aqueous
  • electrolyte
  • mixtures
  • freezing points
  • osmotic coefficients
  • activity coefficients
  • enthalpy of mixing