Summary
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1.
The rate of reduction of metal ions from 1 N sulfate solutions increases in the following order: nickel, cobalt, iron, zinc, copper, cadmium, thallium, and tin.
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2.
The rate of anode solution increases in the series: nickel, cobalt, iron, copper, zinc, cadmium, thallium, and tin.
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3.
The hypothesis is put forward that the different rates of electrochemical reduction of metal ions is connected with the different rates of passivation of the cathode surface during electrolysis.
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