Abstract
The ion pair formation of NaSO −4 has been investigated potentiometrically in 1M NaClO 4 medium at 25°C using two different sodium-selective indicator electrodes and a perchlorate reference electrode. The stability constant of NaSO −4 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 NaClO 4 medium and is a factor which should be considered in the use of NaClO 4 as inert supporting electrolyte.
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Luts, P., Vanhees, J.L.C., Yperman, J.H.E. et al. Potentiometric investigation of NaSO −4 ion pair formation in NaClO4 medium. J Solution Chem 21, 375–382 (1992). https://doi.org/10.1007/BF00647860
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DOI: https://doi.org/10.1007/BF00647860