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18 solutions

Electroplating

Q. What mass of Ni^2+ is produced in solution by passing a current of 67.0 A for a period of 12.0 h, assuming the cell is 87.0% efficient? Express your answer to three significant figures and include the appropriate units.

Solved • Oct 12, 2019

Electroplating

Q. Metal plating is done by passing current through a metal solution. For example, an item can become gold plated by attaching the item to a power source and submerging it into a Au^3+ solution. The item itself serves as the cathode, at which the Au^3+ ions are reduced to Au(s). A piece of solid gold is used as the anode and is also connected to the power source, thus completing the circuit. What mass of gold is produced when 21.4 A of current are passed through a gold solution for 27.0 min? Express your answer with the appropriate units.

Solved • Oct 12, 2019

Electroplating

Q. To improve conductivity in the electroplating of automobile bumpers, a thin coating of copper separates the steel from a heavy coating of chromium. (b) If the area of the trim piece is 50.0 cm^2, what is the thickness of the Cu coating? (d of Cu = 8.95g/cm^3)

Solved • Nov 20, 2019

Electroplating

Q. To improve conductivity in the electroplating of automobile bumpers, a thin coating of copper separates the steel from a heavy coating of chromium. (a) What mass of Cu is deposited on an automobile trim piece if plating continues for 1.25 h at a current of 7.6 A?

Solved • Nov 20, 2019

Electroplating

Q. How many seconds does it take to deposit 41.8 g of Zn on a steel gate when 21.0 A is passed through a ZnSO4 solution?

Solved • Nov 20, 2019

Electroplating

Q. Electrolysis of molten NaCl is a Downs cell is the major isolation step in the production of sodium metal. Assuming that 212 g of Na metal forms, answer the following questions. (c) How many amps will produce this amount in 9.50 h?

Solved • Nov 20, 2019

Electroplating

Q. Electrolysis of molten NaCl is a Downs cell is the major isolation step in the production of sodium metal. Assuming that 212 g of Na metal forms, answer the following questions. (b) How many coulombs are required? Enter your answer in scientific notations.

Solved • Nov 20, 2019