Let’s make CO₂ visible

Try this at home!


Tea-light in a glass jar
Bottle with wide opening

1 cup of water
1 teaspoon of citric acid…or some vinegar
1 teaspoon of citric acid…or a small amount of vinegar
1 teaspoon of sodium bicarbonate…or baking soda

Light the candle. Mix water, acid and sodium bicarbonate in the bottle. Enjoy the reaction. Gently pour the heavy gas onto the candle. Try to relight the candle.

Watch our CTO, Henrik Rödjegård, demonstrate the experiment live.