Isothermal diffusion coefficients for NaCl-MgCl sub 2 -H sub 2 O at 25 degree C. 4. Solute concentration ratio of 1:3

Journal Article · Thu Aug 23 00:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100380a061· OSTI ID:6423702

Mathew, R; Albright, J G; Miller, D G; Rard, J A ^[1]

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1. Univ. of California, Livermore (USA)

Isothermal interdiffusion coefficients have been obtained by Guoy interferometry for the ternary system NaCl-MgCl{sub 2}H{sub 2}O at 25.00{degree}C and a 1:3 molarity ratio of NaCl to MgCl{sub 2}. Data are reported for total molar concentrations of 0.5, 1.0, 2.0, 3.0, and 3.6 M. The main-term diffusion coefficient D{sub 22}, for the flow of MgCl{sub 2} due to its own gradient, changes by only 13% over the above concentration range. In contrast, D{sub 11} for the flow of NaCl due to its own gradient is higher than D{sub 22} at low concentration, and decreases sharply to less than 1/2 its initial value at 3.6 M. Moreover, it crosses the value of D{sub 22} at about 1.2 M. Densities were measured for all solutions.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6423702
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:17; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DENSITY
DIFFUSION
ELECTROLYTES
HALIDES
HALOGEN COMPOUNDS
INTERFEROMETRY
ISOTHERMAL PROCESSES
MAGNESIUM CHLORIDES
MAGNESIUM COMPOUNDS
PHYSICAL PROPERTIES
SODIUM CHLORIDES
SODIUM COMPOUNDS
THERMAL DIFFUSION