catalyst

• What does collision theory state?

  Chemical reactions can only occur 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 to react
• How do catalysts affect the activation energy in a chemical reaction?

  Catalysts provide a different pathway with lower activation energy
• Why are catalysts important in chemistry?

  They allow reactions to occur quickly without increasing temperature
• Can catalysts be reused after a reaction?

  Yes, catalysts are not used up during the reaction
• How do catalysts increase the rate of reaction?

  By allowing more particles to successfully collide per second
• Do different reactions require different catalysts?

  Yes, different reactions need different catalysts
• Should catalysts be included in the chemical equation for a reaction?

  No, catalysts are not included in the chemical equation
• What role do enzymes play in living organisms?

  Enzymes act as catalysts
• What is the effect of a catalyst on the energy profile of a chemical reaction?

  • Catalysts lower the activation energy required for the reaction
  • More particles can successfully collide per second
  • This increases the overall rate of the reaction
• What are the key points to remember about catalysts?

  • Catalysts increase reaction rates but are not consumed
  • They are not included in chemical equations
  • Different reactions require different catalysts
  • Enzymes serve as catalysts in biological systems