Rates of Reaction

• Collision Theory


  Explains the rate of a chemical reaction
• Collision Theory


  • Particles must collide
  • Particles must have enough energy to break chemical bonds (activation energy)
  • Particles must collide in the correct orientation
• Effective collisions per second

  Proportional to the rate of a reaction
• Increasing reactant concentration


  Increases the rate of reaction
• Effective collisions in a solution

  1. Reactants not colliding

  2. Reactants colliding with incorrect orientation

  3. Reactants colliding with insufficient energy

  4. Reactants colliding with correct orientation and sufficient energy
• Increasing gas pressure


  Increases the rate of reaction