What You Need:
Citric acid or tartaric acid
What You Do:
Take ¼ cup of icing sugar. Add ½ teaspoon of sodium bicarbonate and ½ teaspoon of citric or tartaric acid. Mix ingredients together.
Taste. What do you notice?
NB We do not normally eat items that we use in Science. All of these items are considered to be chemicals, and thus must be treated with caution.
You may have to adjust the ingredients to make it sweet enough or to produce more or less fizz.
Where is the Science?
The citric acid reacts with the sodium bicarbonate when it becomes wet with the saliva in the mouth to produce carbon dioxide gas.