Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • moving boundary  (2)
  • Gurney cosphere  (1)
  • 1
    Electronic Resource
    Electronic Resource
    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
    Keywords: Hydrochloric acid ; water-tetrahydrofuran ; water-dioxane ; water-dimethoxyethane ; conductance ; association constants ; proton mobility ; Gurney cosphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652546
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    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
    Keywords: methanol ; moving boundary ; transference numbers ; LiCl ; NaCl ; KCl ; Bu4NBr ; ion-pair association constants ; electrophoretic effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645869
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    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
    Keywords: Transference numbers ; dioxane-water ; ethanol-water ; KCl ; moving boundary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645691
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...