Articles written in Journal of Chemical Sciences
Volume 93 Issue 8 December 1984 pp 1273-1279 Inorganic And Analytical
The reduction of 1-phenylazo-2-naphthol-3,6-disulphonic acid (disodium salt) at the dropping mercury electrode has been investigated. The reduction takes place in a two-electron step. The process is diffusion controlled. The reagent captures two electrons and one or two hydrogen ions depending on whether the pH is higher or lower than 7, producing 1-phenylhydrazo-2-naphthol-3,6-disulphonic acid, in both cases. A disproportionation reaction of the hydrazo compound takes place, and amines are the final reduction products. The reaction orders, together with Tafel’s slopes have been calculated.
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