The United States Mint uses electrolysis to copper plate zinc pennies by placing them in a Cu2+ solution and connecting the pennies and the copper electrode to a battery. Enter the half-reaction that takes place when pennies are plated with solid copper. Include phases.

Are the zinc pennies the cathode or the anode

The half-reaction that takes place when pennies are plated with solid copper is :

Cu^2+(aq) + 2e > Cu(s)

Zinc is the cathode.

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Cathode

Cu^2+(aq) + 2e > Cu(s)

Zinc is the cathode

Explanation:

The plating of copper is normally done by electrolysis. Electrolysis is generally defined as the chemical decomposition produced by passing an electric current through a liquid or solution containing ions.

There are two electrodes, the anode and the cathode. Recall that electrolysis is not a spontaneous process, hence energy from a battery is required to drive the reaction in the desired direction.

The metal to be plated is normally the cathode while the metal used to plate it is normally the anode. Since copper is to be plated on zinc, zinc must be the cathode while copper will be the anode.

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