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Electrode processes of bismuth in weakly acidic, neutral and alkaline solutions

✍ Scribed by Piotr K. Wrona; Zbigniew Galus

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
921 KB
Volume
25
Category
Article
ISSN
0013-4686

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✦ Synopsis

The electrode process Bi(III)+ 3e=Bi(Hg) has been investigated in weakly acidic, neutral and alkaline solutions by means of amalgam polarography and cyclic voltammetry and chronopotentiometry with the use of hanging amalgam drop electrode. It has been found that in weakly acidic and neutral solutions, oxidation of bismuth amalgam goes through aquocomplexes of bismuth. In the cathodic step on cyclic voltammetry curves four peaks of reduction are observed, with magnitude and shape strongly dependent on pH of the solution. These peaks have been ascribed to the reduction of Bi'+, Bi(OH)'+,

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