Original scientific paper

Polarographic Investigations of Some Metal Monocarboxylato Complexes. IV. Influence of Monocarboxylic Acid on the Half-wave Potential of Metal Ions

I. Filipović ; Laboratory of Inorganic Chemistry, Faculty oj Technology and Institute of Inorganic and Analytical Chemistry, !Jniversity of Zagreb, Zagreb, Croatia, Yugoslavia
I. Piljac ; Laboratory of Inorganic Chemistry, Faculty oj Technology and Institute of Inorganic and Analytical Chemistry, !Jniversity of Zagreb, Zagreb, Croatia, Yugoslavia

Abstract

The influence of monocarboxylic acids (formic, ace tic and
butyric) on the h a lf-wa ve potential of metal ions (lead, cadmium,
copper(II) and tha llium(!)) in the monocarboxyl a te buffer was
established. Since this influence is opposite to that of complex
formation, it is n ecessary to investigate the monocarboxylate complexes
in buffers with a constant acid concentration rather than in
buffers with a constant salt-acid r a tio. The positive shift of the
half-wave potential with the increase of the monocarboxylic acid
concentration in the buffer is caused by the change of the liquid
junction potential, by the change of the activity coefficient of the
ion and by the change of the viscosity of the solution.

Keywords

Hrčak ID:

208290

URI

https://hrcak.srce.hr/208290

Publication date:

27.2.1965.

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