Abstract
Impedance measurements have been performed in molten PbCl 2—KCl at 400°C to investigate the mechanism of In(III) reduction and sulphide ion oxidation. In(III) reduction is purely diffusion controlled and represented by a Warburg impedance. The diffusion coefficient obtained for In(III) is D = 0.49 × 10 −5 cm 2s −1. The first oxidation step of sulphide is rapid and also diffusion controlled.
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