Isopiestic study of (calcium chloride + water) and (calcium chloride + magnesium chloride + water)atT = 313.15 K

Author: S. J.B.   Gilchrist M.A.   delgado E.J.  

Publisher: Academic Press

ISSN: 0021-9614

Source: Journal of Chemical Thermodynamics, Vol.33, Iss.4, 2001-04, pp. : 405-411

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Abstract

The osmotic coefficients of aqueous calcium chloride solutions were experimentally determined atT = 313.15 K by the isopiestic method. Magnesium chloride served as the isopiestic standard for the calculation of osmotic coefficients. The molality range covered in this study correspond to about 0.1mol ·kg - 1to 3.0mol · kg - 1. In addition, the osmotic coefficients of aqueous mixtures of calcium chloride and magnesium chloride were determined over the range of ionic strength levels of about 0.1mol · kg - 1to 9mol ·kg - 1and at various mole fractions. The results obtained were correlated by the Pitzer equation.