If you're electroplating, you need a battery and an electrolyte, and two different metals to act as electrodes.
Start with a solution of silver chloride...that's AgCl3 . So if you
want the silver ions to plate out onto the copper,
you have to make the copper the negative electrode
to get the silver positive ions to be attracted to
it. Then you want another metal for the positive
electrode that will "donate" positive ions that
the chlorine will react with - try zinc.
I think your idea to use an acid is good, but I would try hydrochloric acid rather than sulfuric. (Is there a reason you want to use sulfuric acid?) Remember that metal plating is a "redox" reaction in which
one thing get oxidized and one thing gets
reduced...hmmm...so the silver is getting reduced, going from Ag+3 to Ag, and the zinc is getting oxidized, going from Zn to Zn+. The copper is not reacting, and the zinc should replace the silver in solution, and make zinc chloride, right?
So, try this: Start with a solution of silver chloride and add HCl...try something strong like 6 molar. Clip a copper penny (which you know is not solid anyway, right?) to the positive terminal of a power source, and a zinc electrode to the negative side. (Of course, don't turn it on until you have them both in the solution!) Set the power source so that you have
1 Amp of current (remember, 1 Amp is 1
Coulomb/second) to start.
(Here's a good
challenge for you: if Ag+3 is to come
out of solution and plate onto the copper, and
three Zn+ ions will go into solution,
and make 3ZnCl. Write out the equations...
Anyway, try this. (And I do know that redox reactions have been known to be popular on the AP chemistry exam, so good luck!)
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