AP Electrodeposition Problems

How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr(NO₃)₃ using a current of 35.2 amps in an electrolytic cell?

• 5.77 minutes

• 346 minutes

• 115 minutes

• 1.92 minutes

• 17.3 minutes

What current (in A) is required to plate out 1.22 g of nickel from a solution of Ni(NO₃)₂ in 1.0 hours?

• 65.4 A

• 4010 A

• 1.11 A

• 12.9 A

• 2.34 A

How many grams of calcium metal are produced by the electrolysis of molten CaBr₂ using a current of 30.0 amp for 10.0 hours?

(Report your answer with 3 sig figs and no units)

How many grams of Cu are obtained by passing a current of 12 A through a solution of CuSO₄ for 15 minutes?

(Report your answer with 2 sig figs and no units)

How many seconds are required to produce 1.0 g of silver metal by the electrolysis of a AgNO₃ solution using a current of 30. A?

• 2.7 x 10⁴

• 3.2 x 10³

• 3.0 x 10¹

• 3.7 x 10^-5

• 60.

How many grams of copper will be plated out by a current of 2.3 A applied for 25 minutes to a 0.50M solution of copper(II) sulfate?

(Report your answer with 2 sig figs and no units)

Calculate the number of grams of aluminum metal produced in 30.0 minutes by electrolysis of AlCl₃ at a current of 12.0 A.

(Report your numerical value with 3 sig figs and no unit)

How many minutes will it take to plate out 4.56 g of Ni from a solution of Ni(NO₃)₂ using a current of 45.5 amps in an electrolytic cell?

• 2.75 minutes

• 5.49 minutes

• 4.55 minutes

• 155 minutes

• 330. minutes

How many minutes will it take to plate out 16.22 g of Al metal from a solution of Al(NO₃)₃ using a current of 12.9 amps in an electrolytic cell?

• 60.1

• 74.9

• 173

• 225

• 13500

The electrolysis of molten AlCl₃ for 3.25 hours with an electrical current of 15.0 A produces ____ g of aluminum metal.

• 147

• 0.606

• 0.00455

• 16.4

• 49.1