Step 1: Materials
An empty plastic bottle
1/2 cup of hydrogen peroxide WARNING: Keep peroxide off skin.
1 tablespoon of yeast
3 tablespoons warm water
Food coloring of your choice
Safety materials (goggles, gloves, etc.)
Step 2: Creating Elephant Toothpaste
2. Add 8 drops of your favorite food coloring into the bottle.
3. Add about 1 tablespoon of liquid dish soap into the bottle and swish the bottle around a bit to mix it.
4. In a separate small cup, combine the warm water and the yeast together and mix for about 30 seconds.
5. Now the adventure starts! Pour the yeast water mixture into the bottle (a funnel helps here) and watch the foaminess begin!
Step 3: Safety Precautions
- Use safety glasses and gloves to prevent direct contact with your skin and the peroxide which can cause severe irritation.
- It is best to have an adult pour the peroxide, but it is not entirely necessary if you have "a steady hand".
- The elephant toothpaste can make a large mess, so be sure to put the beaker or bottle in a tub for easy clean-up.
- Stay mature. Don't mess around with any supplies or the finished product. Don't eat the foam.
Step 4: The Science Behind It All
C17H35COONa: Dish Soap
C27H25N2NaO7S2: Green Food Coloring
Yeast: We are unable to find a chemical formula. Yeast is living, so it doesn't have a chemical formula
The equation for this is experiment is:
H2O2(aq) + I-(aq) → OI-(aq) + H2O(l) +
We are expecting the yeast to remove all of the oxygen from the hydrogen peroxide. In theory, this will happen very fast and form bubbles and the bottle should get warm. The end product from this will be a foam and heat. The heat shouldn't be much, but a little. The foam, in theory, will go all over the place. But we will be able to clean it up with a dish rag and water. The reaction is exothermic."