Oxygen Cylinder


  1. To determine the effects of mixing manganese dioxide and hydrogen peroxide.


  1. Large graduated cylinder
  2. Powdered manganese dioxide
  3. Hydrogen peroxide (3% or 30%--30% will give better results)


  1. Place some powdered manganese dioxide at the bottom of the graduated cylinder.
  2. Pour in some hydrogen peroxide.
  3. A gas will evolve, which is oxygen. Place a glowing wooden splint in the gas the verify that it is oxygen.


  1. What happens to the hydrogen peroxide?
  2. What is the reaction that occurs?