Question 1
How long will it take to produce 78 g of Al metal by the reduction of Al
3+ in an electrolytic cell with a current of 2.0 A?
◦ 0.01 s
◦ 420 s
◦ 13 h
◦ 116 h
◦ 1.0 × 10
12 s
Question 2
How many coulombs (C) of electrical charge must pass through an electrolytic cell to reduce 0.44 mol Ca
2+ ion to calcium metal?
◦ 190,000 C
◦ 85,000 C
◦ 21,000 C
◦ 42,500 C
◦ 0.88 C