Ternary Isothermal Diffusion Coefficients of NaCl-MgCl2-H2O at 25 C. 7. Seawater Composition

Miller, D G; Lee, C M; Rard, J A

doi:10.1007/s10953-007-9207-5

Title: Ternary Isothermal Diffusion Coefficients of NaCl-MgCl2-H2O at 25 C. 7. Seawater Composition

Journal Article · Mon Feb 12 00:00:00 EST 2007 · Journal of Solution Chemistry

DOI:https://doi.org/10.1007/s10953-007-9207-5· OSTI ID:920867

Miller, D G; Lee, C M; Rard, J A

The four diffusion coefficients D{sub ij} of the ternary system NaCl-MgCl{sub 2}-H{sub 2}O at the simplified seawater composition 0.48877 mol {center_dot} dm{sup -3} NaCl and 0.05110 mol {center_dot} dm{sup -3} MgCl{sub 2} have been remeasured at 25 C. The diffusion coefficients were obtained using both Gouy and Rayleigh interferometry with the highly precise Gosting diffusiometer. The results, which should be identical in principle, are essentially the same within or very close to their combined 'realistic' errors. This system has a cross-term D{sub 12} that is larger than the D{sub 22} main-term, where subscript 1 denotes NaCl and 2 denotes MgCl{sub 2}. The results are compared with earlier, less-precise measurements. Recommended values for this system are (D{sub 11}){sub V} = 1.432 x 10{sup -9} m{sup 2} {center_dot} sec{sup -1}, (D{sub 12}){sub V} = 0.750 x 10{sup -9} m{sup 2} {center_dot} sec{sup -1}, (D{sub 21}){sub V} = 0.0185 x 10{sup -9} m{sup 2} {center_dot} sec{sup -1}, and (D{sub 22}){sub V} = 0.728 x 10{sup -9} m{sup 2} {center_dot} sec{sup -1}.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-48

OSTI ID:: 920867

Report Number(s):: UCRL-JRNL-228049; JSLCAG; TRN: US200805%%217

Journal Information:: Journal of Solution Chemistry, Vol. 36, Issue 11/12; ISSN 0095-9782

Country of Publication:: United States

Language:: English

References (20)

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Mutual Diffusion Coefficients and Densities at 298.15 K of Aqueous Mixtures of NaCl and Na ₂ SO ₄ with NaCl Solute Fractions of 0.9500, Trace Diffusion Coefficients of SO ₄ ^2- in NaCl(aq), and Trace Refractive Index Increments and Partial Molar Volumes of Na ₂ SO ₄ and NaCl ^† Fu, Jingwei; Rard, Joseph A.; Paduano, Luigi Journal of Chemical & Engineering Data, Vol. 47, Issue 3 https://doi.org/10.1021/je010304g	journal	May 2002
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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DIFFUSION
INTERFEROMETRY
SEAWATER

Title: Ternary Isothermal Diffusion Coefficients of NaCl-MgCl2-H2O at 25 C. 7. Seawater Composition

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