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Transcript of Elephant Toothpaste
Our favorite part of the experiment was watching the foam constantly gushing out of the bottle. It was entertaining and actually looked like usable toothpaste. It was fun!
Our hypothesis is that the mixture will foam up because the yeast is used to help baking goods rise and hydrogen peroxide contains lots of oxygen that can form bubbles.
Lots of foam began spouting out of the bottle after pouring in the yeast mixture. The foam was very warm after the reaction meaning it gives off heat. The reaction lasted approximately thirty seconds. With added food colouring it could stain your skin for up to two days.
What We Used
1) Put on some gloves and goggles
2) Get a bottle and use a funnel to pour half a cup of hydrogen peroxide (12%) over a tray
3) Squirt a good amount of dish soap into the bottle
4) (Optional) Add 7-10 drops of food colouring, mix well
5) Pour a tablespoon of yeast into a container, mix well with 3 tbsp of warm water until frothy
6) Pour yeast mixture into the peroxide bottle
- Hydrogen Peroxide 12%
- Water Bottle
- Food Colouring (Optional)
- Dish Washing Soap
- Warm Water
- Gloves and Goggles
What will happen to the mixture of dish soap, hydrogen peroxide and yeast?
1) Name 5 materials used in the experiment.
2) What material activates the solution?
3) What is the enzyme in the yeast called?
Why it happened:
The yeast contains an enzyme called Catalase (kat-a-lace). The enzyme breaks down hydrogen peroxide into oxygen, gas and water.
The oxygen gas gets trapped by the soap, and you get a large foamy solution.
Observation & Results
The most challenging part of the experiment is confirming the experiment would work the way it should. For example, having the right temperature of water to mix in with the yeast it's important because if the water is too hot it kills the enzymes, but if it's too cold it isn't activated.