1.

(i) Calculate the weight of aluminium deposited during the electrolysis of molten aluminium chloride by passing 193 amp of current for 500 min.

Answer»

Solution :`A1^(+3) + 3E^(-) to AL`
Mass of Al deposited `(W) = (Mct)/(ZF)`
M = molecular weight = 27
c = 193 amp
`t = 500 xx 60 s`
Z = 3
`F = 96,500 C`
`W = (27 xx 193 xx 500 xx 60)/(3 xx 96500) = 540 g`


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