Journal article
A potentiometric study of the association of copper(II) and sulfate ions in aqueous solution at 25 °C
Journal of Solution Chemistry, Vol.43(5), pp.885-892
2014
Abstract
A study of the association between copper(II) and sulfate ions in aqueous solution has been made using copper ion-selective electrode potentiometry at constant ionic strengths (I) of 0.05, 0.1, 0.25, 0.5, 1.0, 3.0 and 5.0 mol·L-1 in NaClO4 media at 25 °C. Only one complex was detected, corresponding to the equilibrium: (Formula presented.) No higher order complexes were detected even at sulfate/copper(II) concentration ratios of up to 1,000. The present potentiometric values of log10K1(I) are shown to be consistently higher than those obtained by UV-Vis spectrophotometry because of the failure of the latter technique to detect all of the solvent-separated ion pairs present. Extrapolation of log10K1(I) to infinite dilution using an extended Guggenheim equation yielded a standard state value of log10(Formula presented.), which is in excellent agreement with a recent IUPAC-recommended value.
Details
- Title
- A potentiometric study of the association of copper(II) and sulfate ions in aqueous solution at 25 °C
- Authors/Creators
- C. Akilan (Author/Creator)P.M. May (Author/Creator)G. Hefter (Author/Creator)
- Publication Details
- Journal of Solution Chemistry, Vol.43(5), pp.885-892
- Publisher
- Springer Netherlands
- Identifiers
- 991005543414607891
- Copyright
- © 2014 Springer Science+Business Media New York.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 2 Chemistry
- 2.89 Ionic, Molecular & Complex Liquids
- 2.89.462 Excess Molar Volumes
- Web Of Science research areas
- Chemistry, Physical
- ESI research areas
- Chemistry