* The Reaction: Copper-clad pennies are mostly made of zinc with a thin copper coating. When you combine them with zinc chloride solution, a chemical reaction occurs:
* Copper (Cu) is more reactive than zinc (Zn). This means copper is more likely to lose electrons and become oxidized.
* Zinc chloride (ZnCl2) provides zinc ions (Zn2+) in solution.
* Zinc ions react with the copper coating on the penny. The zinc ions take electrons from the copper, causing the copper to dissolve into solution.
* The zinc from the penny then reacts with the zinc chloride, replacing the copper. This forms a thin layer of copper on the zinc penny.
* The Result: The copper coating on the penny dissolves, leaving a dull grey zinc core. The solution turns blue-green due to the formation of copper ions.
In short, the combination of copper-clad pennies and zinc chloride creates a chemical reaction where the copper is oxidized and dissolves, leaving a zinc core.
Safety Note: This experiment should be conducted with proper safety precautions, including wearing gloves and eye protection.
