Question

An electroplating unit plates 3.0 g of silver on a brass plate in 3.0 minutes. Find the current used by the unit. The electrochemical equivalent of silver is 1.12 × 10−6 kg C−1.

Answer 1

The current used by the electroplating unit is 15A.

Explanation:

It is given that

The mass/weight of the deposited silver, m = 3 g  

The time taken for this purpose is 3 minutes, which is 180 seconds.

ECE of Silver, $z=1.12 \times 10^{-6} \mathrm{kg} \mathrm{C}^{-1}$

So, m = Zit.

Then, $3 \times 10^{-3}=1.12 \times 1 \times 180 \times 10^{-6}$.

This is equal to approximately 15 A.