Cadmium amalgam is prepared by electrolysis of a solution of CdCl2 using a mercury cathode. How long should a current of “4A” be passed in order to prepare 10% by mass Cd in Cd – Hg amalgam on cathode

Question

Cadmium amalgam is prepared by electrolysis of a solution of CdCl2 using a mercury cathode. How long should a current of “4A” be passed in order to prepare 10% by mass Cd in Cd – Hg amalgam on cathode of 4.5 g of Hg? (atomic mass of Cd = 112)

(A) 400 sec
(B) 215.40 sec
(C) 861.6 sec
(D) 430.8 sec

Prashant Kotian · Accepted Answer

Correct answer:

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