2. To obtain cadmium amalgam, a direct current of 500 mA is passed through a cell containing an aqueous solution of cadmium salt and 10 g of metallic mercury serving as a cathode. Calculate the mass fraction of cadmium in the amalgam depending on the electrolysis time and the time required to obtain exactly 10% amalgam. (Answer: 2.9*10^-3%, 57.2 min)

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