Define reaction rate
The change in concentration of a reactant or product over time
Define Instantaneous reaction rate
The value of the rate at a particular time, can be obtained by computing the slope of a ling tangent to the curve at that point
State the collision theory and relate to factors that affect the reaction rate

  • two molecules must collide
  • must collide with the proper angle
  • must collide with enough energy to overcome existing bonds  Activation Energy= minimum Energy needed 

Identify how rate will change if the concentration of reactants changes

  • the number of particles in a given volume also affects the rate at which reactions occur
  • cramming more particles into a fixed volume increasess the concentration fo reactants, the collision frequency and therefore the reaction rate

Describe the effects of a catalyst in a chemical reaction

  • an increase in temperature is not always the best way to increase the rate of a reaction a catalyst, if once can be found, is often better
  • a catalyst is a substance that increases the rate of a reaction without being used up itself during the reaction
  • calysts permit reactions to proceed at a lower activation enegy than is normally required


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