- 500 ml beaker
- 400 ml water
- Sodium bicarbonate
- Citric acid
- Naphthalene ball
- Take a 500 ml beaker add sodium bicarbonate ,citric acid and 400 ml of water. Cover the beaker with lid.
- Put naphthalene balls into the solution. The balls go up and down. It's look like a dance.
Sodium bicarbonate react with citric acid to evaporate carbon dioxide gas. So that the naphthalene balls going up and down.