Catalysts

• What is a catalyst?


  A substance which speeds up the rate of reaction without being used up
• Why are many catalysts used as powders or pellets?


  They have a larger surface area so it increases the efficiency of the reaction
• Do catalysts increase the frequency or energy of collisions?


  Catalysts DON’T, they provide a different way for the reaction to happen which has a lower activation energy
• Why can’t the same catalyst be used in different reactions?

  Catalysts are specific, different substances are needed to catalyst different reactions
• Are catalysts included in the chemical equation for a reaction?


  No, catalysts are not included in the chemical equation for the reaction.
• How does a catalyst affect the energy needed for a successful collision?


  A catalyst reduces the amount of energy needed for a successful collision.
• What effect does a catalyst have on the number of successful collisions?


  A catalyst makes more collisions successful.
• What is one way a catalyst speeds up a reaction?


  A catalyst provides a surface for the molecules to attach to, increasing their chances of bumping into each other.
• What role do enzymes play in biological systems?


  Enzymes act as catalysts in biological systems.
• What catalyst is used in the cracking of hydrocarbons?


  Broken pottery is used as a catalyst in the cracking of hydrocarbons.
• What catalyst is used in the manufacture of ammonia?


  Iron is used as a catalyst in the manufacture of ammonia.
• Why is increasing the rates of chemical reactions important in industry?


  It helps to reduce costs.
• What does the orange label/line indicate? (The image is a reaction involving a catalyst)


  Without catalyst

  
• What does the blue label/line indicate? (The image is a reaction involving a catalyst)


  With catalyst