Rate of reaction

• What is the equation for calculating the rate of a reaction?

  (average) rate of reaction = quantity of products formed / time taken
• What are the units for the rate of reaction equation?

  g/s, cm³/s or mol/min
• What is activation energy?

  The minimum energy required for a reaction
• What does collision theory state?

  Particles must collide with sufficient energy to react
• What factors affect the rate of a reaction?

  • Temperature
  • Concentration
  • Surface area
  • Catalyst
• How does temperature affect the rate of a reaction?

  Higher temperature increases particle energy and movement
• How does concentration affect the rate of a reaction?

  Higher concentration increases frequency of collisions
• How does surface area affect the rate of a reaction?

  Larger surface area increases frequency of collisions
• What is the effect of a catalyst on activation energy?

  A catalyst lowers the activation energy required
• What happens when the surface area is smaller?

  Particles collide less often, slowing the reaction
• How does a catalyst affect the rate of a reaction?

  It increases the rate by lowering activation energy
• What are the practical steps for investigating factors affecting the rate of a reaction?

  1. Identify the factor to investigate (temperature, concentration, etc.)
  2. Set up the experiment with controlled variables
  3. Measure the rate of reaction
  4. Analyze the results
  5. Draw conclusions based on findings