Catalysts 6.8-6.10

• What is the main topic of this video lesson?

  The effect of catalysts on the rate of chemical reactions
• What does collision theory state?

  Chemical reactions can only take place when reacting particles collide with sufficient energy
• What determines the rate of a chemical reaction?

  The frequency of successful collisions
• What is activation energy?

  The minimum amount of energy that particles must have in order to react
• How does the presence of a catalyst affect the activation energy of a reaction?

  A catalyst provides a different pathway for the reaction with a lower activation energy
• Why are catalysts important in chemistry?


  They allow reactions to occur quickly without increasing temperature, saving money
• What happens to catalysts during a chemical reaction?

  Catalysts are not used up and can be reused
• How do catalysts increase the rate of reaction?


  By allowing more particles to successfully collide per second
• Should catalysts be included in the chemical equation for a reaction?

  No, catalysts are not included in the chemical equation
• Do different reactions require different catalysts?

  Yes, different reactions need different catalysts
• What role do enzymes play in living organisms?

  Enzymes act as catalysts
• What is the effect of catalysts on the rate of chemical reactions?

  • Catalysts increase the rate of chemical reactions
  • They provide a lower activation energy pathway
  • More particles can successfully collide per second
  • Catalysts are not consumed and can be reused
• What are the key points about catalysts that should be learned?


  • Catalysts are not included in chemical equations
  • Different reactions require different catalysts
  • Enzymes serve as catalysts in living organisms