Fold the kitchen / paper
towel a few times to get a bit of
2. Lay the
kitchen / paper towel on top of the
saucer and pour out some vinegar until
it is soaked up by the kitchen / paper
3. Place the
penny on the kitchen / paper towel and
leave it there.
4. Keep a check on
the penny and observe the chemical
5. Leave it for a
full day to get the best results.
What happened to the penny?
It turned green.
The copper in the penny reacts
with the oxygen in the air to form
the green colored copper oxide.