Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is
Zn^2+(aq) + 2e^- → Zn(s)
For a large batch of nails, a manufacturer needs to plate a total zinc mass of 4.00 kg on the surface to get adequate coverage.
Identify the anode and cathode when plating an iron nail with zinc.