Equipment: The equipment includes...
- Alka Salza tablets;
- Film canisters;
- Water.
Method:
Stick an Alka Salza tablet to the inside cap of a film canister. Half fill the canister and place the cap on turn upside down onto concrete! The small explosion will propel the canister about 2 metres upwards.
Background knowledge: The reaction releases carbon dioxide gas to a point when the lid can no longer hold the pressure build up. The canister base should then explode off.