Journal article
Potentiometric investigation of the weak association of sodium and oxalate ions in aqueous solutions at 25°C
Australian Journal of Chemistry, Vol.58(3), pp.213-217
2005
Abstract
The formation constant β(NaOx-) of the extremely weak ion pair formed between sodium (Na+) and oxalate (Ox2-) ions in aqueous solutions has been determined at 25°C as a function of ionic strength in tetramethylammonium chloride by Na+ ion-selective electrode potentiometry. The effects of trace Na+ impurities from all reagents were accounted for. An extrapolated value for β° of 6.6 ± 0.5 M-1 was obtained at infinite dilution, which is in good agreement with literature values. Attempts to measure this constant in 1 M CsCl media gave a β(NaOx-) value of 0.00 ± 0.06 M -1, probably because of competition between Cs+ and Na+ for Ox2-.
Details
- Title
- Potentiometric investigation of the weak association of sodium and oxalate ions in aqueous solutions at 25°C
- Authors/Creators
- A. Tromans (Author/Creator)G. Hefter (Author/Creator)P.M. May (Author/Creator)
- Publication Details
- Australian Journal of Chemistry, Vol.58(3), pp.213-217
- Publisher
- Commonwealth Scientific and Industrial Research Organization Publishing
- Identifiers
- 991005543930907891
- Copyright
- © CSIRO 2005.
- Murdoch Affiliation
- School of Chemical and Mathematical Science
- Language
- English
- Resource Type
- Journal article
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