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  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamics of aqueous mixtures of sodium chloride, potassium chloride, sodium sulfate, and potassium sulfate at 25°C (1972)
    Springer
    Journal of solution chemistry 1 (1972), S. 167-172 
    Details
    ISSN: 1572-8927
    Keywords: Excess free energy of mixing ; mixed salt solutions ; osmotic coefficients ; KCl ; K2SO4 ; NaCl ; Na2SO4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Aqueous solutions of sodium chloride, potassium chloride, sodium sulfate, and potassium sulfate can be mixed in six ways to give ternary mixtures. Two of these have already been studied and results are now presented for the remaining four systems: H2O−NaCl−K2SO4, H2O−Na2SO4−K2SO4, H2O−KCl−Na2SO4, and H2O−KCl−K2SO4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01028452
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Free energy relationships in aqueous amino acid and peptide solutions containing sodium chloride (1974)
    Springer
    Journal of solution chemistry 3 (1974), S. 493-501 
    Details
    ISSN: 1572-8927
    Keywords: Amino acids ; peptides ; diglycine ; triglycine ; isopiestic method ; ion-dipole interactions ; NaCl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Three systems of the type amino acid or peptide-sodium chloride-water have been investigated over wide solute molality ranges using the isopiestic vapor pressure method. The amino acid employed was L-α-alanine, while the peptides were diglycine and triglycine. Equations were obtained for the activity coefficients of these compounds in the salt solutions in terms of the molalities of the solutes. The trace activity coefficients of the peptides were negative at low salt molality and became positive as the salt molality was increased. The limiting interaction parameters were calculated for the systems using the Kirkwood ion-dipole expression and empirical quantities derived from previous work to obtain the salt effect on the nonpolar and amide portion of the molecule. Good agreement was obtained between the calculated values and the experimental results in the case of diglycine, but they diverged in the case of triglycine. The calculated value for L-α-alanine is in poorer agreement with the experimental value than for the other amino acids studied previously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648134
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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