Question

The atomic weight of silver and copper are 108 and 64. A silver voltameter and a copper voltameter are connected in series and when current is passed 10.8 gm of silver is deposited. The mass of copper deposited will be

• A. 6.4 gm
• B. 12.8 gm
• C. 3.2 gm
• D. 10.8 gm

Answer 1

Answer: (C)

3.2 gm

Answer 2

Equivalent weight of copper $= \frac{64}{2} = 32$

$\frac{\text{Equivalent weight of }Cu}{\text{Equivalent weight of }Ag} = \frac{\text{Weight of }Cu\text{ deposited}}{\text{Weight of }A\text{g deposited}}$

Weight of copper deposited $= \frac{10.8 \times 32}{108} = 3.2gm$