Catalysts

• A catalyst is a substance that increases the rate of a chemical reaction , without being used up in the process
• Catalysts are not included in the chemical equation for the reaction
• What else does a catalyst do?

  It reduces the amount of energy needed for a successful collision - It make more successful collisions - It speeds up the reaction - It provides a surface for the molecules to attach to , which increases their chances of bumping into each other
• Enzymes act as catalysts in biological systems
• What is the catalyst used in the cracking of hydrocarbons?

  broken pottery
• What is the catalyst used in the manufacture of ammonia?

  Iron