Abstract
The pressure dependences of the self-diffusion coefficients of deuterium oxide in 4.5m solutions of LiCl−D2O and CsCl−D2O (also 7m) and 3.06m CaCl2−D2O have been measured by the NMR spin-echo method at 30°C, 60°C, and 90°C. Shear viscosities and densities of these solutions have also been determined over the same range of experimental conditions. The experimental data show that the diffusion constantD decreases with the increasing structure-making ability of the electrolyte cation Ca+2>Li+. In contrast, the diffusion coefficient for D2O in the 4.5 and 7m CsCl solutions is equal to that for pure D2O at 30°C but lower at 60°C and 90°C. It has been found that the Stokes-Einstein equation relates well the diffusion coefficients to shear viscosity in these concentrated electrolyte solutions.
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Akai, J.A., Jonas, J. The effect of pressure and temperature of self-diffusion coefficients in several concentrated deuterium oxide diamagnetic electrolyte solutions. J Solution Chem 5, 563–574 (1976). https://doi.org/10.1007/BF00647378
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DOI: https://doi.org/10.1007/BF00647378