Things You Need
- a small plastic, zip-lock sandwich/freezer bag
- 3 teaspoons of *bicarbonate of soda*
- 1/4 cup of warm water
- 1/2 cup of vinegar
- a tissue
What To Do
Do this outside or in the sink (it's messy!)
- put your bicarbonate wrapped in tissue into the bag
- close the zip fully (and quickly!)
- put 1/4 cup of warm water into the bag
- next put 1/2 cup of vinegar into the bag
- wrap 3 teaspoons of bicarbonate of soda in the tissue
- now quickly,
- put your bicarbonate wrapped in tissue into the bag
- close the zip fully (and quickly!)
- put your bag in outside, or in the sink and stand back
- if all goes well, the bag will get bigger and bigger and BANG
The Science Bit...
The vinegar (acid) and the bicarbonate (alkali) react with each other and release carbon dioxide (a gas). The gas causes the pressure inside the bag to increase, until the plastic bag can't take any more and EXPLODES.