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  • KCl  (3)
  • water-dimethoxyethane  (2)
  • 1
    Digitale Medien
    Digitale Medien
    A conductance investigation of HCl in aqueous solutions of tetrahydrofuran, dimethoxyethane and dioxane (1990)
    Springer
    Journal of solution chemistry 19 (1990), S. 1211-1224 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Hydrochloric acid ; water-tetrahydrofuran ; water-dioxane ; water-dimethoxyethane ; conductance ; association constants ; proton mobility ; Gurney cosphere
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Conductance of dilute solutions of HCl in water-tetrahydrofuran (THF), water-dioxane and water-dimethoxyethane (DME) were measured and the data processed using the Justice-Ebeling equation to evaluate the limiting conductance ΛO, the association constant KA and the apparent distance of closest approach a'. The Friedman-Rasaiah Gurney cosphere overlap term d+−/kT was calculated from a' values and illustrates the different solvation pattern of dioxane compared to that found for THF and DME. It would appear that dioxane can solvate cations more strongly due to its ability to form a boat configuration around a cation. The association constants are reasonably reproduced by the Bjerrum equation using realistic molecular dimensions of the ions involved for the distance of closest approach. The limiting conductance in the mixtures illustrates clearly the different mechanism for proton conductance compared to that for the cesium ion. The dielectric constants, viscosities and densities of the solvent mixtures were measured and are reported. The lowest dielectric constant for each type of solvent mixture was about 10.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00652546
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  • 2
    Digitale Medien
    Digitale Medien
    The temperature coefficient of conductance for the alkali metal, halide, tetraalkylammonium, halate, and perhalate ions in D2O (1975)
    Springer
    Journal of solution chemistry 4 (1975), S. 745-762 
    Details
    ISSN: 1572-8927
    Schlagwort(e): KCl ; KBr ; KClO3 ; KBrO3 ; KlO3 ; KClO4 ; KlO4 ; D2O ; conductance ; transference numbers ; aqueous solutions ; structural effects ; solvent isotope effects
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Precise limiting ionic conductance data are reported for the first time for the alkali metal and tetraalkylammonium ions in D2O at 10°C as well as similar data for the halate and perhalate ions in D2O and H2O at 10 and 25°C. Precise transference numbers by the moving-boundary method are also reported for KBr in D2O at 10°C and, as a check on earlier work, for KCl in D2O at 25°C. In general, the structural properties of the ions, as reflected in the temperature coefficient of the limiting ionic conductances, are enhanced in D2O compared to H2O, although the differences are often small.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00650531
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  • 3
    Digitale Medien
    Digitale Medien
    Transference numbers for anhydrous methanol solutions at 10 and 25°C (1973)
    Springer
    Journal of solution chemistry 2 (1973), S. 23-35 
    Details
    ISSN: 1572-8927
    Schlagwort(e): methanol ; moving boundary ; transference numbers ; LiCl ; NaCl ; KCl ; Bu4NBr ; ion-pair association constants ; electrophoretic effect
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Transference numbers are reported for LiCl and NaCl in methanol at 25°C and for NaCl, KCl, and Bu4NBr in methanol at 10°C. The potentiometric moving-boundary method as developed by Kay and Fratiello was employed to give a precision of about 0.05% and an accuracy of at least 0.1% as indicated by two independent determinations of the conductances of the Cl− and Br− ions. The data are extrapolated by the Fuoss-Onsager theory, and the magnitude of the electrophoretic effect is calculated as described by Kay and Dye. The agreement with this theory is quite good at both temperatures, although the å value required in the case of Bu4NBr is considerably larger than that obtained from conductance data. This agreement contrasts with that obtained for ethanol and acetone solutions where the measured electrophoretic effect is considerably larger than the corresponding calculated values. The importance of this fact in the determination of ion-pair association constants is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00645869
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  • 4
    Digitale Medien
    Digitale Medien
    Transference numbers for KCl in ethanol-water and dioxane-water mixtures at 25°C (1974)
    Springer
    Journal of solution chemistry 3 (1974), S. 857-864 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Transference numbers ; dioxane-water ; ethanol-water ; KCl ; moving boundary
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Transference numbers were determined by the moving-boundary method for KCl in aqueous mixtures containing 12, 20, 40, 60, and 79 wt. % ethanol, and 22, 44, 62, and 75 wt. % 1,4-dioxane. The boundaries were detected by the potentiometric method using an autogenic cell with a cadmium anode. Little concentration dependence was expected since all the transference numbers were close to 0.5. The Fuoss-Onsager theory for the electrophoretic effects was used for extrapolation to infinite dilution. The precision of the measurements appears to be well within 0.05%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00645691
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  • 5
    Digitale Medien
    Digitale Medien
    A comparison of ion-solvent interactions evaluated from both emf and conductance data for HCl in aqueous solvent mixtures (1994)
    Springer
    Journal of solution chemistry 23 (1994), S. 703-709 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Hydrochloric acid ; water-dioxane ; water-tetrahydrofuran ; water-dimethoxyethane ; conductance ; EMF ; association constants ; short range non-coulombic interactions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Available emf data for HCl in water-dioxane, water-tetrahydrofuran, and water-dimethoxyethane at 25°C have been analyzed using models based on similar levels of approximation as was used previously for conductance data. The emf data were evaluated in terms of standard cell potentials, apparent distances of closest approach, association constants and a Gibbs energy term attributed to non-coulombic ion-solvent interaction. Although emf and conductance data give essentially the same results it is clear that the conductance method, with its much greater precision, is superior for this type of analysis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00972716
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