Tuesday, October 7, 2008

PURIFICATION AND USES OF COPPER



keep impure copper at anode and purecopper wire at cathode


At anode


Cu --------------Cu²+ + 2e-

At cathode


Cu²+ + 2e- ------------- Cu



* Salt solution of copper (CuSo4 ) is used as the electrolyte.

* The copper from the anode goes to the solution as C


* Cu²+ ion goes to the cathode and gets deposited.


Uses Of Copper:

1- Electrical wiring: good conductor of electricity.
2- Domestic plumbing: does not react with water.
3- Making alloys like brass (zinc & copper): harder than copper & zinc.
4- Making coins: long lasting without any corrosion
.

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chemistry notes / igcse-gcse- Olevel

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