BRAINCAKE

Kinetics

AQA AS-level ChemistryTopic 5 of 1614 lessons

Revision notes for Kinetics in AQA Chemistry (7404). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.

  1. Collision TheoryFor a reaction to occur, the particles that are reacting must be moving with enough kinetic energy to collide with enough energy for existing bonds…
  2. Factors Affecting Rate of ReactionIncreasing the pressure of a gas.
  3. Activation EnergyFor a chemical reaction to occur, the bonds within the reactants must be broken and new bonds must be formed between the atoms to make the products.
  4. Exothermic ReactionsThe reaction profile diagram for an exothermic reaction shows the enthalpy change and activation energy.
  5. Endothermic ReactionsIn an endothermic reaction energy is taken in from the surroundings, so the temperature of the surroundings falls.
  6. Maxwell-Boltzmann DistributionAt any given temperature, molecules have a range of speeds and energies.
  7. Maxwell-Boltzmann Distribution and Activation EnergyFor a chemical reaction to occur, the bonds within the reactants must be broken and new bonds must be formed between the atoms to make the products.
  8. The Effect of Temperature on Reaction RateThe Maxwell-Boltzmann distribution curve show the distribution of energy of the particles.
  9. CatalystsCatalysts are substances that speed up chemical reaction without themselves being chemically changed.
  10. Catalytic ConvertersCars have catalytic converters fitted to their exhaust pipes.
  11. Exam Style Question - 1Question: Use the Maxwell-Boltzmann distribution to explain why a small increase in temperature causes a large increase in the rate of a reaction.
  12. Exam Style Question - 2Question: A student added magnesium ribbon to 1.0 mol dm-3 hydrochloric acid, then repeated the experiment with 2.0 mol dm-3 acid, keeping…
  13. Exam Style Question - 3Question: Explain how a catalyst increases the rate of a reaction.
  14. Exam Style Question - 4Question: A student reacted marble chips (calcium carbonate) with excess hydrochloric acid and collected the carbon dioxide in a gas syringe.

On the specification

All AQA AS-level Chemistry topics