LC chemistry rate of reactions

  1. Define the rate of reaction
    the change in concentration per unit time of any one reactant/product
  2. Define the instantaneous rate of the reaction
    The rate of reaction at any one particular time during the reaction

    and calculated using the slope
  3. List factors affecting rates of reactions
    • The nature of the reactants
    • Particle size
    • concentration
    • temperature
    • Presence of a catalyst
  4. What is a catalyst
    A substance that alters the rate of a chemical reaction but is not consumed in the reaction
  5. Define an enzyme
    A substance that is produced by a living cell and acts as a biological catalyst
  6. Homogeneous catalyst
    a catalysis in which both the reactants and the catalyst are in the same phase

    there is no boundary between the reactacts and the catalyst
  7. Heterogenous catalysis
    Catalysis in which the reactants and the catalyst are in different phases.

    there is a boundary between the reactants and the catalyst
  8. Autocatalysis
    A catalysis in which one of the products of the reaction acts as a catalyst for the reaction
  9. What is adsorption
    A substance is drawn down onto the surface of a solid
  10. What materials are a catalytic converter covered in?
    • Platinum
    • Palladium
    • Rhodium
  11. Why is the catalytic converter covered in transition metals
    catalyze the conversion of a vehicle's pollutant exhaust gases into less harmful substances that are safer to release
  12. Define activation energy
    The minimum energy which colliding particles must-have for a reaction to occur

    the minimum energy required for the effective collision between particles to occur
Card Set
LC chemistry rate of reactions