thats the new solid formed right...?
it was worth a shot
Mg -> Mg2+ + 2e- Cu2+ + 2e- -> Cu
Overall therefore it'd be: Mg (s) + Cu2+ (aq) -> Mg2+ (aq) + Cu(s)
I have a D- in chem. I've never failed anything before >_>
lol that does not help!