Given the reaction that occurs in an electrochemical cell:

Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)

During this reaction, the oxidation number of Cu changes from

A) 0 to +2

B) 0 to –2

C) +2 to 0

D) –2 to 0

c) +2 to 0

Explanation:

SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge

Cu(s) is a solid metal and they have no charge, therefore it is zero

Copper undergoes Oxidation (gain of electrons)

thats how its supposed to be