Question 1
How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu
2+ ions to produce 3.00 moles of copper metal?
◦ 0.311 hours
◦ 3.22 hours
◦ 0.621 hours
◦ 1.61 hours
Question 2
Chromium can be electroplated from an aqueous solution containing sulfuric acid and chromic acid, H
2CrO
4. What current is required to deposit chromium at a rate of 1.25 g/min?
◦ 38.7 A
◦ 116 A
◦ 232 A
◦ 38.1 A