Chemistry 3

Rate of Reaction 


A catalyst increases the rate of reaction but remains unchanged at the end of a reaction. Only a small amount of the catalyst is needed. A catalyst is specific to a particular reaction

Surface Area 

  • Large lumps have a smaller surface area.
  • Small lumps have a larger surface area
  • Powders have a much greater surface area
  • If smaller lumps of a solid are used the surface area increases so the particles have more effective collisions per second. This means the reaction is faster.


An explosion is a very fast chemical reaction that makes and releases large volumes


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