Cadmium amalgam is prepared by electroly...

Cadmium amalgam is prepared by electrolysis of a solution of `CdCl_2` using Hg cathode. For how long should electrolysis be carried out in order to prepare 12% by weight of cadmium amalgam using 22.0 g of Hg as cathode and a current strength of 5 ampere? (Cd = 112)

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