Abstract
Pitzer's equation for the activity coefficient has been applied to LiCl, NaCl, KCl, RbCl, CsCl, and HCl in methanol-water mixtures at 25°C. The two parameters, β (0)MX and β (1)MX , were obtained by the method of least squares. The same values of b and α as for aqueous systems could be used for the methanol-water mixtures without greatly affecting the standard deviation of the fit. β (0)MX was found to decrease with methanol content for the alkali metal chlorides whereas β (1)MX was found to increase. For HCl, however, a slight maximum and a minimum were found in the values of β (0)MX while a maximum was observed in the values of β (1)MX .
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References
K. S. Pitzer,J. Phys. Chem. 77, 268 (1973).
A. R. Gupta,J. Phys. Chem. 83, 2986 (1979).
G. Akerlof,J. Am. Chem. Soc. 52, 2353 (1930).
D. Feakins and P. J. Voice,J. C. S. Faraday Trans. I 68, 1390 (1972).
R. G. Bates and R. A. Robinson, inChemical Physics of Ionic Solutions, B. E. Conway and R. G. Barradas, eds., (Wiley, New York, 1966), p. 211.
H. S. Harned and H. C. Thomas,J. Am. Chem. Soc. 57, 1666 (1935).
M. Paabo, R. G. Bates, and R. A. Robinson,Anal. Chem. 37, 462 (1965).
R. G. Bates and D. Rosenthal,J. Phys. Chem. 67, 1088 (1963).
M. Paabo, R. A. Robinson, and R. G. Bates,J. Chem. Eng. Data 9, 374 (1964).
I. T. Oiwa,J. Phys. Chem. 60, 754 (1956).
G. Nonhebel and H. Hartley,Phil. Mag. 50, 729 (1925).
H. P. Bennetto and J. J. Spitzer,J.C.S. Faraday Trans. I 69, 1491 (1973).
D. H. Whiffen,Pure and Appl. Chem. 51, 35 (1979).
D. S. P. Koh, unpublished results.
D. N. Card and J. P. Valleau,J. Chem. Phys. 52, 6232 (1970).
R. G. Bates, inHydrogen-bonded Solvent Systems, A. K. Covington and P. Jones, eds., (Taylor and Francis, London, 1968), p. 49.
R. A. Robinson and R. H. Stokes, inElectrolyte Solutions, 2nd edn., (Butterworths, London, 1959), p. 495.
H. S. Harned and H. C. Thomas,J. Am. Chem. Soc. 58, 761 (1936).
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Koh, D.S.P., Khoo, K.H. & Chan, CY. The application of the pitzer equations to 1-1 electrolytes in mixed solvents. J Solution Chem 14, 635–651 (1985). https://doi.org/10.1007/BF00646056
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DOI: https://doi.org/10.1007/BF00646056