d_bakalov

http://en.wikipedia.org/wiki/McMurry_reaction You just need one ketone and one aldehyde with proper structure

i'm sorry for the mistake

You want to obtain solid cooper from cooper sulphate? And if so, you need electrolysis with positiv cooper electrode(it''s very good if it's pure cooper). Cooper ions will accept electrons from the cooper electrode and it will grow, because of forming metal cooper.