Chemistry

Ms. Prazuch and Mr. Cohen

Unit OutlinesPowerPointsHomeworkRegents Review

Gummi Bear Terminator:
The Exothermic Demise of the Gummi Bear

Gummi Bears

Heat
      2 KClO3 ----------->  2KCl + 3O2

Lesson Links:
Gummi Bear Lesson Plan
Gummi Bear YouTube Video


This demonstration gives an example of an extremely exothermic reaction. It is also an example of a decomposition reaction that occurs rapidly when a catalyst (heat) is used. In addition, it provides the opportunity to apply the glowing splint test to test for the presence of oxygen.  While watching the video, try to think about the following questions:

  1. What is a decomposition reaction? 
  2. Discuss and balance the chemical equation for this reaction. 
  3. How do we test for the presence of oxygen in a reaction? 
  4. Why do we use a catalyst for some reactions? What are some examples of a catalyst? 
  5. What is the difference between an exothermic and an endothermic reaction?
  6. Why do we use a Bunsen burner in this reaction? 
  7. Why do we do the glowing splint test before putting the Gummy Bear into the test tube?
  8. What caused the Gummy Bear to explode? 
  9. Examine what the products are.