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Reaction Experiment - Shiny Coins

 
Shiny Coins
Materials you will need:

• Paper towel
• Lemon juice
• Plastic cup / bowl
• Dirty / old copper coins
stack of pennies
 
Steps
 
1.  Fill the cup / bowl with some lemon juice.

2.  Put the dirty copper coins in the juice and let them soak for a few minutes.

3.  Remove the coins from the cup / bowl and place on the paper towel..

Oxygen in the air reacts with copper, making a copper oxide coating.  

This is what makes copper coins dirty.  

The acid in the lemon juice reacts with the oxide and removes it from the coins – making then shiny copper coins once again.

 
 
Subjects :  


 
 
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