“Magical transformation” experiment
How to make plastic bottle contract
We’d like to show you a trick: how to transform a bottle through the “power of thought”!
Reagents and equipment:
- plastic bottle;
- sodium bicarbonate;
- acetic acid;
- sodium hydroxide;
Sprinkle sodium bicarbonate into the bottle, then add acetic acid. Wait until the gas bubble stop being released. Test the presence of gas with a match. If it goes out by the neck of the bottle, then the bottle is completely full. Add sodium hydroxide. Seal the bottle and shake it a couple of times. The bottle will start to contract.
In the interaction of sodium bicarbonate and acetic acid, sodium acetate, water and carbon dioxide are released. Carbon dioxide does not support combustion, so the match goes out. When sodium hydroxide is dissolved, a great amount of heat is released, and the bottle melts slightly. In the interaction of sodium hydroxide and carbon dioxide, sodium bicarbonate forms. The amount of gas in the bottle decreases, and the bottle contracts under the impact of external pressure.
Wear protective gloves and glasses. Sodium hydroxide is a caustic substance that causes burns.
Warning! Don’t try to repeat this experiment without a professional supervision!