1.

Cadmium amalgam is preparedby electrolysisof a solutionof CdCI_(2)usingof 4A bepassedinorder to perpare 10%byweightCd in theCd -Hg amalgamon cathode of 4.5 g Hg ?

Answer»

400 SEC
215.40 sec
861.6 sec
430.8 sec

Solution :10 g Cdshouldpresentwith 90 g. HG Wt. of Cdrequiredwith4.5 g of Hgat cathode, `= (10)/(90) xx 4.5`
`=0.5 , (Cd^(+2) + 2e^(-) to Cd)`
`(0.5)/(112) xx 2 =( 4 xx t)/(96500)`
`THEREFORE t= 215.40 sec`


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