Effects+of+different+chemicals+on+pennies

Title: Effects of different liquids on pennies

Question: What will bleach, Coca-Cola, vinegar, laundry detergent, and lemon juice each do to a penny minted before 1982 and one minted after 1982 (1982 was when pennies were changed to copper)

Background: Each liquid has a different pH and different chemical compositions that may affect the physical appearance of the pennies.

Hypothesis: The liquids will alter the physical appearance of the pennies

Materials: 1. 6 pennies minted before 1982 2. 6 pennies minted after 1982 3. 10 bowls 4. 2 cups of bleach 5. 2 cups of Coca-Cola 6. 2 cups vinegar 7. 2 cups of laundry detergent 8. 2 cups of lemon juice 9. Timer 10. Tweezers (We can get these ourselves)

Methods: 1. Place one penny in each bowl, leave out one penny from each group for control 2. Pour one cup of each liquid into a bowl with a pre-1982 penny, and the other cup into a bowl with a post-1982 penny 3. Wait 12 hours, check all pennies, take pictures, record data 4. Wait another 12 hours, remove pennies from bowls, record data

Bibiliography: [] [] [] [] [] []