Quirkles Love Test for Valentine's Day

Quirkles  "Love Test"

This activity will get a lot of oohs and aahs!

Objective:
To demonstrate how yeast can act as a catalyst to release oxygen

Materials
Plastic empty soda bottle (16 ounce, preferably with a narrow neck)
Dry  yeast   (NEW fast acting works best)
Warm water
Measuring cup
Teaspoon
Foil pan with two-inch sides

Procedure:
Place the bottle in the center of the foil pan.  Place the funnel in the bottle opening.   Pour one-half cup hydrogen peroxide into the bottle.  Add three drops of food coloring to the hydrogen peroxide.  Add a squirt of dish detergent to the peroxide mixture in the bottle.  Dissolve one teaspoon of yeast in the warm water.  Pour the mixture into the bottle and quickly remove the funnel.

Conclusion:
The reaction creates foam that shoots up out of the bottle and flows into the pan. Hydrogen peroxide is made up of two hydrogen atoms and two oxygen atoms (H2O2).  The yeast acts as a catalyst.   When you pour the yeast into the hydrogen peroxide, you are releasing oxygen atoms.  The bottle and bottom of the pan will feel warm due to the exothermic reaction (chemical reaction that produces heat).