How to make Coke or soda to release its gas bubbles adding the particles of salt.
Things Required:
Small baby-food jar
1 teaspoonful of table salt
Coke or soda, any flavour carbonated beverage
Directions:
Fill the jar one-half full with the soda. Add 1 teaspoonful of salt to the soda.
This Is What Happens:
Bubbles form in the
liquid; then foam
appears on top of
the soda.
Science Behind It:
Each bubble seen in the soda is a collection of carbon dioxide gas. Both salt and carbon dioxide are the examples of matter and matter takes up space. When the salt is added to the cola, it pushes the bubbles of carbon dioxide out of its way. These bubbles rise to the top bringing small amounts of soda with them. This movement of the gas forms the foam on top of the liquid. Replacing a gas with another substance is called effervescence.
