When aqueous copper(II) sulfate is electrolysed with copper electrodes, what are the correct products formed at the anode (positive electrode) and the cathode (negative electrode)?
- Aanode: aqueous copper(II) ions; cathode: copper metal
- Banode: aqueous copper(II) ions; cathode: hydrogen gas
- Canode: oxygen gas; cathode: copper metal
- Danode: oxygen gas; cathode: hydrogen gas