Case Charcoal
How is copper industrially purified?
It’s one of the questions that is on a past GCSE exam paper but I have no idea how copper is actually purified. It’s a 5 mark question, I have to describe the process…..so does anyone know?
I don’t know if it means copper from copper oxide, I’m assuming that’s what it means, in which case, is it just heating up the copper oxide with charcoal powder?
Please help!
Hi Gooby, yes I speak Arabic. I’m from Iraq =)
By electrolysis.Impure copper isis made the anode in a large tank of dilute copper sulphate and a thin sheet of pure copper is also put in the tank so thetwo sheets do not touch each other.The impure sheet is connected to the + side of a source DC. current and the pure starter sheet is made the negative.copper ions move to and join the pure sheet,this makes the solution short of copper so copper is dissolved from the impure sheet.This process continues until all the copper dissolved from the impure sheet and joined on to the pure sheet.Impurities do not cross to the pure sheet.
As a matter of interest, which you will not be taught in school ,a lot of the impurity falls to the bottom of the tank under the impure sheets ,these are the ‘anode slimes’;they are a valueable source of rare ,expensive and important metals such as Platinum, Iridium,Gold Etc.
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