Isothermal diffusion coefficients for NaCl-MgCl[sub 2]-H[sub 2]O. 6. Concentration ratios 3:1, 1:1, and 1:3 near saturation at 35[degree]C

Journal Article · Thu Dec 08 00:00:00 EST 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100100a039· OSTI ID:6659219

Wu, J; Albright, J G; Miller, D G ^[1]

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1. Texas Christian Univ., Fort Worth, TX (United States)

Isothermal interdiffusion coefficients have been obtained by the Gouy interferometric free-diffusion method for the system NaCl-MgCl[sub 2]-H[sub 2]O at 35[degree]C. The solute molality ratios were 3:1, 1:1, and 1:3 at total molar solute concentrations of 3.78, 3.70, and 3.58 mol dm[sup [minus]3], respectively. These total molarities correspond to three nearly the same molalities for which data are available at 25[degree]C. The results suggest that within experimental error the four diffusion coefficients of this ternary system at 35[degree]C are about 1.25 times larger than their corresponding values at 25[degree]C, which is close to the fluidity ratio for pure water at these same two temperatures. However, the ratio for the main term diffusion coefficients D[sub 11] and D[sub 22] appeared on the average to be a little greater than this value (1.28 and 1.26), and the ratios for the cross-term diffusion coefficients D[sub 12] and D[sub 21] appeared to be a little less than this value (1.21 and 1.24). 23 refs., 1 fig., 3 tabs.

• OSTI ID: 6659219
• Journal Information: Journal of Physical Chemistry; (United States), Vol. 98:49; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AQUEOUS SOLUTIONS
DIFFUSION
MAGNESIUM CHLORIDES
SODIUM CHLORIDES
CALCULATION METHODS
COMPILED DATA
DENSITY
ISOTHERMAL PROCESSES
TEMPERATURE DEPENDENCE
WATER
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DATA
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
MAGNESIUM COMPOUNDS
MIXTURES
NUMERICAL DATA
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SODIUM COMPOUNDS
SOLUTIONS
400201* - Chemical & Physicochemical Properties