Cu is a reducing agent, FeCl3 is an oxidizing agent.
Reactants:
FeCl3 – Iron(III) chloride, Iron trichloride
Other names: {{ubl, Ferric chloride, Ferric chloride (anhydrous)Iron(3+);trichloride, Ferric;trichloride, [FeCl3], FeCl3, Iron chloride, Flores martis, Molysite
Appearance: Green-black by reflected light; purple-red by transmitted light; yellow solid as hexahydrate; brown as {{abbr|aq.|aqueous}} solution ; Black-to-brown hygroscopic crystals
Cu
Names: Copper, Copper (dusts and mists, as Cu), CuCU-7, Tatum-T, Paragard T 380A, Element 29, Cuprum, Copper metal dusts, Copper metal fumes
Appearance: Solid in various forms. turns green on exposure to moist air ; Reddish, lustrous, malleable, odorless solid.