Im doing electroplating with copper lab report. (CHEMFAX : Electroplating with copper lab) I have some questions about it.

Cu2+(aq) + Fe(s) -> Cu(s) +Fe2+(aq)

Provide as many type/classification or these reactions : can I say redox and oxidation and reduction?

2. does galvanized nail get copper plated better or worse? and why?

3. how can explain the relevance of the law of conservation of matter to this lab?

4. did the number of moles of Cu lost by the electrode equal the amount gained by the key? what reasons have caused this to be different?