caa a22 4500 477139361 CHVBK 20180405111728.0 cr unu---uuuuu 170330e19971001xx s 000 0 eng 10.1007/BF02768053 doi (NATIONALLICENCE)springer-10.1007/BF02768053 Protonation and sodium ion-pairing of the sulfite ion in concentrated aqueous electrolyte solutions [Elektronische Daten] [S. Capewell, G. Hefter, P. Sipos, P. May] A protocol has been developed for the reliable titration of aqueous sulfite solutions which minimizes photodecomposition effects. This procedure has been used to measure the protonation constants of the sulfite ion in aqueous solution by glass electrode potentiometry at 25.0‡C and ionic strengths (I) from 0.1 to 5.0M in NaCI media and atI = 1.0M in KC1 and Me4NCl media. These measurements provided evidence of weak but significant ionpairing between SO2/3 -and Na+ with a formation constant of logK Na = 0.431 in 1.0M Me4NCl. This was in very good agreement with the value logK Na = 0.410 measured directly by Na+ ion-selective electrode potentiometry. Evidence is also presented for an extremely weak association of K+ and SO 2 3 -with logK k = 0.22 in 1.0M Me4NCl. Plenum Publishing Corporation, 1997 Potentiometry nationallicence sulfite nationallicence protonation constant nationallicence sodium ion nationallicence potassium ion nationallicence ion-pairing nationallicence concentrated electrolytes nationallicence ion-selective electrode nationallicence Capewell S. A. J. Parker Cooperative Research Center for Hydrometallurgy, Murdoch University, W.A. 6150, Murdoch, Australia aut Hefter G. Department of Chemistry and Mineral Science, Division of Science, Murdoch University, W.A. 6150, Murdoch, Australia aut Sipos P. CSIRO Division of Minerals, W.A. 6152, Waterford, Australia aut May P. A. J. Parker Cooperative Research Center for Hydrometallurgy, Murdoch University, W.A. 6150, Murdoch, Australia aut Journal of Solution Chemistry Springer US 26/10(1997-10-01), 957-972 0095-9782 26:10<957 1997 26 10953 https://doi.org/10.1007/BF02768053 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02768053 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Capewell S. A. J. Parker Cooperative Research Center for Hydrometallurgy, Murdoch University, W.A. 6150, Murdoch, Australia aut NATIONALLICENCE 700 1- Hefter G. Department of Chemistry and Mineral Science, Division of Science, Murdoch University, W.A. 6150, Murdoch, Australia aut NATIONALLICENCE 700 1- Sipos P. CSIRO Division of Minerals, W.A. 6152, Waterford, Australia aut NATIONALLICENCE 700 1- May P. A. J. Parker Cooperative Research Center for Hydrometallurgy, Murdoch University, W.A. 6150, Murdoch, Australia aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US 26/10(1997-10-01), 957-972 0095-9782 26:10<957 1997 26 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer