The Decompostion of Hydrogen Peroxide

This could be used as an introductory lesson to chemical reactions that allows students to make observations on the characteristics that take place, such as the formation of a gas.  Students could discuss the changes and decide whether a physical or chemical reaction has occured.  This activity could further lead to the discussion of  a catalyst. This site addresses the properties of a chemcial reaction.

Standards & Objectives

Essential and guiding questions: 

Observations:

  • How much foam is produced, and how quickly?
  • Does it matter if you use lukewarm water to activate the yeast or cold water?
  • What happens if you add more or less soap? 
  • What happens if you don't add any soap?

Lesson Variations

Blooms taxonomy level: 
Applying

Helpful Hints

Supplies:

  • An empty 20 oz soda bottle (or any tall skinny clear container)
  • Hydrogen peroxide (you can get 3% at the grocery store, or 8% at a beauty supply store)
  • Active yeast
  • Warm water
  • Liquid dish soap
  • Food coloring - optional - but it does make a nice color!

References

Contributors: