Make your food dance using this simple chemical reaction and demonstrate science in the kitchen at the same time!
You will need:
- A clear glass
- Bicarbonate of soda
- White vinegar
- Fill the glass 3/4 up with vinegar
- Add some raisins
- Add 1-2 tbs of bicarbonate of soda
- Watch your raisins dance!
The science bit:
Your acid (vinegar) and alkali (bicarbonate of soda) react to make carbon dioxide. Because the surface of raisins are rough, the tiny bubbles of carbon dioxide gas stick to it. The carbon dioxide bubbles travel upwards, taking the raisin with them, until the bubbles pop and the raisin sinks again!
Why not try?:
- Using a fizzy drink instead of bicarb and vinegar
- Trying some other acids and alkalis
- Seeing if you can get other foods to dance!