College Chemistry : Rate Laws
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Example Questions
Example Question #11 : Kinetics
What are the units for the rate constant 
Because the rate of a chemical reaction is always in 
If we replace the variables above with their units, the equation will look like this:
Therefore, in order to match, 
Example Question #12 : Kinetics
If the reaction:
Follows the mechanism:
What is the rate order with respect to 
Because B is in the rate determining step (the slow step) then we know that it is not zero order with respect to the concentration of B.
However, because there is only one molecule of B reacting in the rate determining step, we know that this reaction is first order with respect to the concentration of B.
Example Question #13 : Kinetics
If the reaction:
Follows the mechanism:
What is the rate order with respect to 
The rate law is determined by the slowest step in a reaction mechanism. Because B is not a reactant in the slow step, then it will not appear in the reaction mechanism.
Therefore, the reaction is zeroth order in relation to the concentration of B.
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