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  • 1
    Electronic Resource
    Electronic Resource
    Isopiestic measurements at high temperatures: I. Aqueous solutions of LiCl, CsCl, and CaCl2 at 155°C (1994)
    Springer
    Journal of solution chemistry 23 (1994), S. 1061-1072 
    Details
    ISSN: 1572-8927
    Keywords: Osmotic coefficients ; isopiestic ; Pitzer model ; LiCl ; CsCl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Isopiestic measurements have been made for LiCl (aq) and CsCl (aq) at a temperature of 155°C. Equilibrium molalities ranged up to 21 mol-kg−1. MgCl2(aq) was chosen as the reference electrolyte. The apparatus used for the isopiestic experiments is an enhanced version of that developed by Grjotheim and co-workers. To test its precision osmotic coefficients of CaCl2 (aq) have also been determined and compared with previously reported vapor pressure measurements at high concentrations. The results show a very good coincidence. The data can be described by the ion interaction model of Pitzer. The resulting set of parameters allows a fit of the experimental osmotic coefficients with a standard error of 0.0078 and 0.0114 for LiCl(aq) and CsCl (aq), respectively. The osmotic coefficients of LiCl are consistent with data at lower molalities, but there are discrepancies for the CsCl solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00976256
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  • 2
    Electronic Resource
    Electronic Resource
    Isopiestic measurements at high temperatures: III. The ternary system KCl−MgCl2−H2O at 155°C (1996)
    Springer
    Journal of solution chemistry 25 (1996), S. 83-93 
    Details
    ISSN: 1572-8927
    Keywords: Osmotic coefficients ; isopiestic ; Pitzer model ; modified B.E.T. equation ; ternary system ; MgCl2, KCl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract At a temperature of 155.5°C, isopiestic measurements have been made for the ternary system KCl−MgCl2−H2O at 12 different solute mole fractions. Total equilibrium molalities ranged up to 9.71 mol-kg−1. MgCl2(aq) was chosen as the reference electrolyte. A description of the osmotic coefficients by the ion interaction model of Pitzer gave an overall standard error of 0.0177. The binary Pitzer parameters have been taken from Holmes, Mesmer, and Valyashko et al. for KCl(aq) and MgCl2(aq), respectively. It was necessary to use both mixing parametersΘ MgK andΨ MgKCl for the fit, but an additional introduction of an ionic strength dependence for these parameters yielded no further improvement. Due to the solubility limits the modified B.E.T. equation according to Stokes and Robinson could be applied only to a small subset of all data points.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00972761
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