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Cd amalgam is preapred by electrolysis o...

Cd amalgam is preapred by electrolysis of a solution `CdCI_(2)` using a mercury cathode. How long should a current of `5A` be passed in order to prepare `12% Cd-Hg` amalgam on a cathode of `2g, Hg`( atomic weight of `Cd = 112.4)`

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The correct Answer is:
`t=93.65sec`.
`Cd^(2+)+2e^(-)toCd`
Cd required for 2 g of `Hg=(12xx2)/(88)=0.2727g`
`t=(2xx96500xx2727)/(1124xx5)=93.65sec`.
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