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  • 1
    ISSN: 1572-8927
    Keywords: Activity coefficients ; lithiumpara-ethylbenzenesulfonate ; osmotic coefficients ; sodium chloride ; sodiumpara-ethylbenzenesulfonate ; mixed electrolyte solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Osmotic coefficients for aqueous mixtures of sodium chloride with sodiumpara-ethylbenzenesulfonate NapEBS and lithiumpara-ethylbenzenesulfonate LipEBS with NapEBS obtained by the gravimetric isopiestic vapor pressure comparison method are interpreted with the Scatchard neutral-component and with the Pitzer ion-component equations. Ionic and mean ionic activity coefficients for Na+ and Cl− ions and for NaCl, respectively, were also determined with an electrochemical cell. The γ±(NaCl) values at constant unit ionic strength,I=1.00, were compared with those computed from osmotic-coefficient measurements. Strong anion-anion interactions were observed in the NaCl-NapEBS mixtures.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1572-8927
    Keywords: Activity coefficients ; benzyltrimethylammonium chloride ; excess free energy of mixing ; mixed electrolyte solutions ; osmotic coefficients ; sodium chloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Osmotic coefficients for aqueous mixtures of sodium chloride with benzyltrimethylammonium chloride, BzMe3NCl, obtained by the gravimetric isopiestic vapor pressure comparison method are interpreted with the McKay-Perring transform, with the Scatchard neutral electrolyte treatment, and with the Pitzer ion-component equations. Molal ionic and mean ionic activity coefficients for Na+ and Cl− ions and for NaCl, respectively, in these mixtures at unit total ionic strength also were determined with an electrochemical cell. The excess free energy chenges ΔGex on mixing NaCl with BzMe3NCl were estimated and employed to gain an insight into the relative importance of like and unlike cation-cation interactions.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 6 (1977), S. 747-756 
    ISSN: 1572-8927
    Keywords: Activity coefficients ; aqueous solutions ; mixed electrolyte solutions ; osmotic coefficients ; perchloric acid ; uranyl perchlorate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Isopiestic vapor pressure comparison measurements were conducted with the three-component system HClO4+UO2(ClO4)2+H2O in the concentration range between I=0.05 and 1.9m. Analysis of the mixture composition and concentration dependence of the osmotic coefficients with the Scatchard neutral-electrolyte and ion-component methods and with the Pitzer ioncomponent methods gave equally satisfactory results. Prediction of the observed osmotic coefficients by two-component approximations was satisfactory, and the data agreed well with values estimated with a model based on the osmolal fraction. A fair concordance was also found between predicted solute activity coefficients from simple models and values derived from complete treatments which included interaction terms.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 7 (1978), S. 229-238 
    ISSN: 1572-8927
    Keywords: Activity coefficients ; aqueous solutions ; osmotic coefficients ; sodium pertechnetate ; sodium perrhenate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Isopiestic vapor-pressure comparison experiments were performed with aqueous binary sodium perchlorate, pertechnetate, and perrhenate solutions to concentrations of approximately 8.5 m. Osmotic coefficients for these solutions and mean molal ionic activity coefficients for NaTcO4 and NaReO4 were derived from the isotonic molalities. Pitzer's treatment was applied to describe the concentration dependence of the osmotic coefficients of NaClO4, NaTcO4, and NaReO4, and the implications of the parameters derived from a leastsquares fit are discussed in terms of solvent structure and interionic forces.
    Type of Medium: Electronic Resource
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