Ionization of water in concentrated potassium halide media

Faradj K. Samani, Stephen G. Capewell, P. Sipos, Peter M. May, Glenn Hefter

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The ionic product of water, pK w = -log[H +][OH -], has been determined as a function of ionic strength (7) in concentrated aqueous solutions of KCl, KBr and Kl at 25°C by high-precision glass electrode potentiometric titrations. The pK w values obtained are in excellent agreement with, but generally more precise than, literature data. At I > 1 M the pK w values increase smoothly and show systematic differences in the order KCl <KBr <Kl, consistent with the decreasing H +-acceptor ability of the medium anions. Analogous behaviour is observed in MCl solutions, with pK w values varying in the order NaCl <KCl <CsCl. Formation constants of MOH 0 ion pairs derived from these data are consistent with literature values.

Original languageEnglish
Pages (from-to)369-373
Number of pages5
JournalAustralian Journal of Chemistry
Volume53
Issue number5
Publication statusPublished - 2000

Fingerprint

Ionization
Potassium
Water
Ionic strength
Titration
Anions
Ions
Glass
Electrodes
potassium bromide
hydroxide ion
cesium chloride

Keywords

  • Bromide
  • Chloride
  • Iodide
  • Ionic product
  • Potassium ion
  • Potentiometry
  • Water dissociation

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Samani, F. K., Capewell, S. G., Sipos, P., May, P. M., & Hefter, G. (2000). Ionization of water in concentrated potassium halide media. Australian Journal of Chemistry, 53(5), 369-373.

Ionization of water in concentrated potassium halide media. / Samani, Faradj K.; Capewell, Stephen G.; Sipos, P.; May, Peter M.; Hefter, Glenn.

In: Australian Journal of Chemistry, Vol. 53, No. 5, 2000, p. 369-373.

Research output: Contribution to journalArticle

Samani, FK, Capewell, SG, Sipos, P, May, PM & Hefter, G 2000, 'Ionization of water in concentrated potassium halide media', Australian Journal of Chemistry, vol. 53, no. 5, pp. 369-373.
Samani, Faradj K. ; Capewell, Stephen G. ; Sipos, P. ; May, Peter M. ; Hefter, Glenn. / Ionization of water in concentrated potassium halide media. In: Australian Journal of Chemistry. 2000 ; Vol. 53, No. 5. pp. 369-373.
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