In this science experiment make some foaming and fizzing chemical reactions. We will
also learn about carbon dioxide gas.
- 1 tablespoon of baking soda
- 1 tablespoon of laundry detergent
- 3/4 cup of water
- 1/4 cup of vinegar
- Several drops of food coloring
- 12-ounce drinking glass
- Plastic tray or cookie sheet
Procedure Foaming And Fizzing Experiment
1) Set the glass on the plastic tray or cookie sheet.
2) Add the baking soda and laundry detergent to the glass.
3) Add water and a few drops of food coloring.
4) Stir the mixture in the glass.
5) Quickly pour the vinegar into the glass to produce foaming and fizzing chemical
6) The chemical reaction will foam up and over the rim of the glass. The tray will
become covered with a foamy substance of tiny bubbles.
To create a color change when the vinegar is added, you can use red cabbage juice
instead of food coloring. The experiment titled "Exploring Acids and Bases with Red
Cabbage" gives instructions on how to prepare some red cabbage juice. With red
cabbage juice, the mixture will change color from blue-green before adding vinegar to
red-orange after the vinegar. For a different color change use grape juice.
Video Elephants Toothpaste The Mother Of All Foaming and Fizzing Experiments
The Science Behind The Foaming and Fizzing Experiment
In this experiment, the fizz is produced by a chemical reaction between baking soda and
vinegar. As baking soda and vinegar react carbon dioxide gas is produced. The gas
forms bubbles inside the liquid. Laundry detergent permits the bubbles last longer. As
a result foam is generated. The volume of the gas produced and trapped in the foam is
much greater than the glass can hold, so some of it spills over the top of the glass.
Baking soda is sodium bicarbonate. Vinegar is composed partially of acetic acid.
Baking soda reacts with many common acids. The result of the chemical reaction with
vinegar is carbon dioxide gas, sodium acetate, and water.
This chemical reaction of creating carbon dioxide gas and bubbles is common in
cooking. They are known as "leavening agents" and are added to cakes. As the cake
bakes in the over, carbon dioxide gas bubbles are released making the cake batter
rise. As it heats up and cooks it becomes solid and traps the carbon dioxide gas
bubbles in the batter making it fluffy.
Another fun thing to try. Do the baking soda and vinegar chemical reaction in a plastic
water or soda bottle. However after you mix the vinegar and baking soda into the bottle
secure a balloon over the top of the bottle to trap the carbon dioxide gas and inflate your
balloon. This allows you to see the escaping Co2 gas from the chemical reaction.
Now go and do some foaming and fizzing experiments with your friends.
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