ISSN:
1572-9567
Keywords:
aqueous solutions
;
diffusion coefficients
;
electrolytes
;
Taylor dispersion
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Measurements of mutual diffusion coefficients of several metal chlorides in aqueous solutions close to infinite dilution have been made with the Taylor dispersion technique. Data were obtained for alkaline earth metal chlorides. BeCl2/H2O, MgCl2/H2O, CaCl2/H2O, SrCl2/H2O, and BaCl2/H2O, and for third-family metal chlorides, AlCl2/H2O, and GaCl3/H2O. All the measurements were obtained at five temperatures between 298.15 and 318.15 K. A linear dependence between the mutual diffusion coefficient and temperature was found. In the range of temperatures studied here, the values of the mutual diffusion coefficients follow a sequence: BaCl2 〉 SrCl2 〉 CaCl2 〉 MgCl2 〉 BeCl2 for alkaline-earth metal chlorides and GaCl3 〉 AlCl3, for third-family metal chlorides. That is, the higher the atomic weight of the cation. the higher the mutual diffusion coefficient. A comparison of mutual diffusion coefficients of alkaline, alkaline earth, and third-family metal chlorides is presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01439189
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