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Effect of indifferent electrolytes on the behaviour of surface active substances at the dropping mercury electrode

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Summary

The effect of different concentrations of indifferent electrolytes on the hehavior of benzene, isobutyl alcohol, and lauryl-p-toluidine-2-sodium sulphonate on the dropping mercury electrode capacity has been investigated. It is found that the depression of capacity caused by benzene diminishes with increase in the concentration of KCt. The factors responsible for this have been discussed. The important feature of the behavior of isobutyl alcohol is the formation of a small desorption peak at about 0.13 volts at higher concentrations of the indifferent electrolyte. Owing to the presence of two peaks, lauryl-p-toluidine-2-sodium sulphonate has a complicated behaviour but one striking feature is the enhancement of the main desorption peak by increasing the electrolyte concentration. The effect of divalent cations on the behavior of bromocresol purple and thymol blue on the dropping mercury electrode capacity has also been investigated.

Zusammenfassung

Die Wirkung verschieden hoher Konzentrationen von indifferenten Elektrolyten auf das Verhalten von Benzol, iso-Butylalkohol, und Lauryl-p-toluidin-2-Na-Sulfonat auf die Kapazität der Quecksilbertropfelektrode wurde untersucht.

Die Depression der Kapazität durch Benzol verschwindet mit steigendem KCl-Gehalt. Die hierfür verantwortlichen Faktoren werden diskutiert. Bei Isobutylalkohol ist die Ausbildung eines kleinen Desorptionsmaximums von etwa 0,13 Volt bei höheren Konzentrationen von indifferenten Elektrolyten auffällig. Lauryl-p-toluidin-2-Na-Sulfonat zeigt zwei Spitzen. Hier erhöht sich die Hauptdesorptionsspitze mit steigenden Elektrolytkonzentrationen. Der Effekt bivalenter Kationen auf das Verhalten von Bromkresol-Purpur und Thymolblau gegenüber der Quecksilber -tropfelektrode wurde ebenfalls untersucht.

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References

  1. Doss and Kalyanasundaram, Proc. Indian Acad. Sci.,1952, 35, p. 27.

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  2. Doss and Gupta, Proc. Indian Acad. Sci.1952, 36, p. 493.

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  3. Doss and Gupta, Bull. Cent. Electr.-Chem. Rs. Inst. India,1954, Vol. I, No. 2, p. 9.

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  5. Gupta, unpublished.

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Gupta, S.L. Effect of indifferent electrolytes on the behaviour of surface active substances at the dropping mercury electrode. Kolloid-Zeitschrift 141, 100–102 (1955). https://doi.org/10.1007/BF01510556

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  • DOI: https://doi.org/10.1007/BF01510556

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