Question

If 54 g of silver is deposited during an electrolysis reaction, how much aluminium will be deposited by the same amount of electric current?
A. 2.7 g
B. 4.5 g
C. 27 g
D. 5.4 g

Answer 1

Correct Answer - B
1 F deposits 108 g of Ag `(Ag^(+) + e^(-) to Ag )`
54 g of Ag will be deposited by `1/108xx54=1/2F`
3 F deposite 27 g of Al (`Al^(3+) + 3e^(-) to Al`)
`1/2F` will deposit `27/3xx1/2`=4.5 g of Al