Heat, increasing surface area, agitation, and addition of a catalyst are all possibilities. In this case a catalyst will be used to lower the activation energy required for the reaction to occur. Next, instruction should be given about how to test for and recognize certain gasses produced in the lab. Hydrogen is lighter than air and makes a barking or squeaking sound when tested with a flaming wooden splint. Oxygen is about the same density as air and causes a glowing splint to burst into flame.
Carbon dioxide is heavier than air and puts out a flame.
Nitrogen also extinguishes flame. To print out the Student Copy only, click here . Analyze the liquid. Add about a pinch of yeast to the hydrogen peroxide. Shake it until well mixed and put the cork on the test tube.