Summary
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1.
The negligible influence of the ionic strength (in KC1 solutions) and nature of the cation (in 0.5 M solutions of cesium and potassium chlorides) on the volume component of the catalytic waves of hydrogen in unbuffered pyridine solutions indicates the absence of any appreciable effect of the structure of the electric double layer in the volume interaction of pyridine with water and that of pyridinium ions with hydroxyl ions.
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2.
In the case of small dropping periods of the dropping electrode (t ≈ 0.3 sec), the surface component of the catalytic current in unbuffered pyridine solutions becomes appreciable only when the potassium chloride concentration is lowered below 0.25 M. The surface current is especially great in a 0.5 M solution of LiCl; the surface component of the catalytic current is not manifested at all in a 0.5 M solution of CsCl.
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3.
The dissociation constants of pyridine in a number of salt solutions were determined potentiometrically according to the method of Kilpi and Grunwald, and the rate constants of the protonation of pyridine by water and the deprotonation of pyridinium ions by hydroxyl ions were calculated from the polarographic data.
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The article is published on the basis of a resolution of the Conference of the Editors-in-Chief of the Journals of the Academy of Sciences, USSR of July 12, 1962 as the dissertation work of M. K. Polievktov.
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 413–419, March, 1965
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Polievktov, M.K., Mairanovskii, S.G. Influence of the concentration and nature of the cation of indifferent electrolytes on the polarographic catalytic waves of hydrogen induced by pyridine in unbuffered solutions. Russ Chem Bull 14, 400–405 (1965). https://doi.org/10.1007/BF00846592
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DOI: https://doi.org/10.1007/BF00846592