In an electrolytic cell with copper and tin electrodes, what is the overall reaction?

• A. Copper(II) ions are reduced to copper solid, and tin solid is oxidized to tin(II) ions.
• B. Tin solid is reduced to tin(II) ions, and copper(II) ions are oxidized to copper solid.
• C. Copper solid is reduced to copper(II) ions, and tin(II) ions are oxidized to tin solid.
• D. Tin(II) ions are reduced to tin solid, and copper solid is oxidized to copper(II) ions.

Answer: (D)