Chemistry Homework Help

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Electroplating

Q. 8. What is the mass of gold (in g to one decimal place) is produced with a 6.0 A current for 3.0 hours? Au^3+(aq) + 3e^- → Au(s)

Solved • Oct 11, 2019

Electroplating

Q. Silver can be electroplated at the cathode of an electrolysis cell by the half-reaction. Ag+(aq)+e−→Ag(s) What mass of silver plates onto the cathode when a current of 8.1 A flows through the cell for 78 min ? Express the mass in grams to two significant figures.

Solved • Nov 6, 2019

Electroplating

Q. Gold can be plated out of a solution containing Au3+ according to the half reaction Au3+(aq) + 3 e- -> Au(s). how long will it take to plate out 10.0g Au(s) (MAu=197.0g/mol) at an average current of 7.5 A?

Solved • Oct 19, 2019

Electroplating

Q. Copper can be electroplated at the cathode of an electrolysis cell by the half reaction: Cu2+(aq)+2e---->Cu(s) What is the amount of current that flows in the cell when the electrolysis is conducted for 180 seconds to plate 325 mg of Copper?

Solved • Oct 16, 2019

Electroplating

Q. What mass of calcium can be produced by electrolysis of molten CaCl2 if a current of 7.5x103 A is applied by 48 hours. (Be careful with the units!). F 96500 C/mol.

Solved • Aug 8, 2019

Electroplating

Q. Metallic magnesium can be made by the electrolysis of molten MgCl2. How many minutes are needed to plate out 10.0 g of Mg metal from molten MgCl2, using 3.50 A of current? Mg2+ + 2e- → Mg

Solved • Aug 8, 2019

Electroplating

Q. To electrodeposit all the Cu & Cd from a solution of CuSO4 and CdSO4 required 1.30 F. The mixture of Cu and Cd that was deposited had a mass of 50.34 g. What mass of CuSO4 was in the original mixture?

Solved • Apr 22, 2019