Question

If 54 g of silver is deposited during an electrolysis reaction, how much aluminum will be deposited by the same amount of electric current?

• A. $2.7g$
• B. $4.5g$
• C. 27 g
• D. $5.4g$

Answer 1

Answer: (B)

$4.5g$

Answer 2

1 F deposits 108 g of Ag $(Ag^{+} + e^{-} \rightarrow Ag)$

54 g of Ag will be deposited by $\frac{1}{108} \times 54 = \frac{1}{2}F$

3 F deposit 27 g of Al $(Al^{3 +} + 3e^{-} \rightarrow Al)$

$\frac{1}{2}F$ will deposit $\frac{27}{3} \times \frac{1}{2} = 4.5gofAl$