Journal of Solution Chemistry

, Volume 21, Issue 4, pp 375–382

Potentiometric investigation of NaSO4 ion pair formation in NaClO4 medium

  • P. Luts
  • J. L. C. Vanhees
  • J. H. E. Yperman
  • J. M. A. Mullens
  • L. C. Van Poucke


The ion pair formation of NaSO4 has been investigated potentiometrically in 1M NaClO4 medium at 25°C using two different sodium-selective indicator electrodes and a perchlorate reference electrode. The stability constant of NaSO4 obtained in this study was \(\beta _{{\rm N}aSO_4^ - } = 4.1 \pm 0.4\). Although \(\beta _{{\rm N}aSO_4^ - } \) is small, it lowers the free sulfate concentration drastically in 1M NaClO4 medium and is a factor which should be considered in the use of NaClO4 as inert supporting electrolyte.

Key words

Stability constants potentiometry ion-selective electrodes ionic medium method sodium sulfate 


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Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • P. Luts
    • 1
  • J. L. C. Vanhees
    • 2
  • J. H. E. Yperman
    • 2
  • J. M. A. Mullens
    • 2
  • L. C. Van Poucke
    • 2
  1. 1.Tessenderlo ChemieTessenderloBelgium
  2. 2.Inorganic and Physical ChemistryLimburgs Universitair CentrumDiepenbeekBelgium

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