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25 solutions

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 21.1 A of current are passed through a gold solution for 18.0 min? Express your answer with the appropriate units.

Solved • Mar 7, 2020

Electroplating

Q. What mass of Cu(s) is electroplated by running 25.0 A of current through a Cu^2+(aq) solution for 4.00 h? Express your answer to three significant figures and include the appropriate units.

Solved • Mar 7, 2020

Electroplating

Q. With a power supply able to produce 125 A of current, how long must the nails stay in the electrolysis chamber to receive 1.48x10^7 C of charge? Express your answer to three significant figures and include the appropriate units.

Solved • Mar 7, 2020

Electroplating

Q. What substance is produced at the anode during the electrolysis of a mixture of molten calcium bromide, CaBr2(l), and molten magnesium iodide, MgI2(l)? Assume standard conditions. Express your answer as a chemical formula.

Solved • Mar 4, 2020

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 17.1 A of current are passed through a gold solution for 42.0 min? Express your answer with the appropriate units.

Solved • Mar 4, 2020

Electroplating

Q. What substance is produced at the cathode during the electrolysis of a mixture of molten calcium bromide, CaBr2(l), and molten magnesium iodide, MgI2(l)? Assume standard conditions. Express your answer as chemical formula.

Solved • Mar 4, 2020

Electroplating

Q. Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn^2+(aq) + 2e^- → Zn(s) For a large batch of nails, a manufacture needs to plate a total zinc mass of 2.10 kg on the surface to get adequate coverage. Identify the anode and cathode when plating an iron nail with zinc.

Solved • Mar 4, 2020