Reaction Mechanism Worksheet

 

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  1. What is a reaction mechanism?

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  2. A reaction mechanism is comprised of a series of______ _______.  These steps are termed as ___________ (involving one molecule) ___________ (involving two molecules) and ___________ (involving three molecules) - which are ____  _______, ____  _______and ____  _______, respectively.

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  3. Reaction mechanisms must


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  4. What is the rate determining step?

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  5. Write the rate law for the following elementary step

    O3(g) + O(g)    →2O2(g)

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  6. What is the rate law and overall balanced equation for the following mechanism?

NO2(g) + NO2(g)→NO3(g) + NO       Slow
NO3(g) + CO(g)→ NO2(g) + CO2(g)   Fast

     

     

  1. What is an intermediate?

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  2. When do we use the steady state approximation?

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  3. Find the rate law for the following

                                    2NO  N2O2                                   

 

N2O2 + H2→N2O + H2O                

     

     

  1. How would the method used and results differed if we had known the relative speeds of reaction for the two elementary steps?

    2NO  N2O2                              Fast Equilibrium     

     

    N2O2 + H2    →N2O + H2O                       Slow

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