Step 4 To recover
the copper metal place a piece of magnesium ribbon in the coppersulfate
solution. You will notice instantly the copper coming out of solution
and depositing on the magnesium metal. If you wish to wait overnight or
a few days place an iron nail in the solution and notice the slow deposition
of copper.
If time permits
place an iron nail in the solution and leave it for a day or two.
When all the copper has been
deposited the solution becomes clear. Why do you think the copper sulfate
solution is blue?