# Equation for Galvanization and Electrolysis of Saltwater with Copper and Zinc

I am looking for the chemical equations for both the galvanization and electrolysis of saltwater utilizing copper and zinc. The closest I have gotten was from this site: Explanation for the reactions in a saltwater battery with zinc and copper electrodes

Although, that question and answer was exactly the format I was looking for and was impressive, the final equation was ultimately for galvanization in a two-tank bridged battery. I would like to see what the equation looks like for a single-tank with both copper and zinc sharing the same solution.

In addition, I would very much appreciate the reaction equation for the electrolysis version. If those answering could keep it to a similar format as the answer I linked above, it would be much appreciated.

If you want to have the $$\ce{Zn/Cu}$$ cell work in electrolysis, you first must connect both positive and both negative poles together, and apply an external tension greater that that of the $$\ce{Zn/Cu}$$ cell.
If you apply a sufficiently high tension to overcome the tension produced by the $$\ce{Zn/Cu}$$ cell, you will produce an electrolysis with the following reactions:
• at the negative pole (Zn), for lack of any reducible ion in solution, H from water is reduced according to : $$\ce{H_2O + 2 e- -> H2 + 2 OH^-}$$
• at the positive pole (Cu), two oxidation reactions may happen simultaneously : $$\ce{Cu-> Cu^{2+}} + 2 e-$$ with probably a side reaction :$$\ce{2H2O -> O2 + H+ + 4 e-}$$The relative importances of these reactions depend on the concentration of $$\ce{NaCl}$$. The first must be the most important .