Journal article
Thermodynamics of protonation and sodium binding of sulfate in concentrated NaCl and CsCl solutions studied by Raman spectroscopy
Australian Journal of Chemistry, Vol.53(5), pp.363-367
2000
Abstract
The protonation constant (pKa) of SO42-(aq) has been determined at ionic strengths 0.5 M ≤ I ≤ 4.0 M in NaCl and CsCl media at 25°C by using Raman spectroscopy. These data were used to calculate the association constant of the NaSO4- (aq) ion pair in CsCl media. The results are in excellent agreement with previous values obtained by other techniques. The pKa was also measured at I = 4 M in both media at temperatures up to 85°C and the associated enthalpy and entropy changes were calculated. However, reliable thermodynamic data for the ion-pairing reaction could not be obtained at higher temperatures probably because of competition from CsSO4-(aq).
Details
- Title
- Thermodynamics of protonation and sodium binding of sulfate in concentrated NaCl and CsCl solutions studied by Raman spectroscopy
- Authors/Creators
- S. Kratsis (Author/Creator)G. Hefter (Author/Creator)P.M. May (Author/Creator)P. Sipos (Author/Creator)
- Publication Details
- Australian Journal of Chemistry, Vol.53(5), pp.363-367
- Publisher
- Commonwealth Scientific and Industrial Research Organization Publishing
- Identifiers
- 991005543449207891
- Copyright
- © CSIRO 2000.
- Murdoch Affiliation
- School of Chemical and Mathematical Science
- Language
- English
- Resource Type
- Journal article
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