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Here are some free rate of reaction questions and answers.

  1.  How does a catalyst speeds up a reaction?
  2. Does increasing the concentration of a reaction Always increases the rate of the reaction?
  3. Where would the Maxwell-Boltzmann Distribution shift if temperature increases, to the right or to the left?
  4. Reactions occur in a series of steps called?
  5. What is the overall order of a reaction?
  6. Does catalyst increase speed of reactants?
  7. A energy profile diagram shows the products have more energy than reactants. What kind of reaction is this?
  8. In a zero order reaction what is the shape of the graph is it curved or straight?


Answers:

  1. By lowering the activation energy.
  2. No increasing the concentration of a reaction does not always increase the rate of the reaction.
  3. To the right.
  4.  Mechanism.
  5. This is the sum  of the order of the reactants.
  6. No.
  7. Endothermic.
  8. The shape of the graph is straight.


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    The rate of a reaction is not how much of products are formed nor how much of reactants disappears but rather how fast the reaction takes place.

    For a reaction to take place there are certain conditions that must occur:
    • The particles must collide with enough energy for bonds to break.
    • The particles must be properly orientated.
    The speed of a reaction can be found in a number of ways:



    1. By measuring the time a certain amount of product is formed
    2. By measuring the time taken for a reactant to disappear.
    Factors affecting the rate of a reaction:
    • Concentration
    • Particle size
    • Pressure
    Concentration:- Increasing the concentration of a reaction increases the rate of the reaction.

    Particle size: - The smaller the particle the faster the rate of the reaction.

    Pressure:- Like concentration increasing the pressure increases the rate of the reaction but its usually for gases.
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