Gallium is produced by the electrolysis of a solution o

Gallium is produced by the electrolysis of a solution obtained by dissolving gallium oxide in concentrated NaOH(aq). Calculate the amount of Ga(s) that can be deposited from a Ga(III) solution by a current of 0.530 A that flows for 70.0 min.

Solution

the electrolysis expression is:

Ga3+ + 3e- ——> Ga

1 mol of Ga requires 3 mol of electron

1 mol of electron = 96485 C

So,1 mol of Ga requires 289455 C

let us calculate the charge passed:

t = 70.0 min = 70.0*60 s = 4200 s

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