Recall that the rate or a reaction is identical to the rate of the slowest eleme
ID: 1003215 • Letter: R
Question
Recall that the rate or a reaction is identical to the rate of the slowest elementary step in the mechanism. For any reaction, there are many possible mechanisms. The actual mechanism must be determined experimentally. Below are two proposed mechanisms for the destruction of ozone. Determine the net reaction for both mechanisms above. Identify the intermediate(s) in mechanism Identify the intermediate(s) in mechanism What is the molecularity of the rate limiting step in the above mechanisms? Mechanism 1 Mechanism 2 Write the rate law for each of the net reactions based on the given mechanisms. Mechanism 1 Mechanism 2 The experimentally determined rate law for the destruction of ozone is as follows: Rate = k [O_3]. Which mechanism is consistent with the experimental rate law? True or false (Explain your answer. THIS IDEA IS VERY IMPORTANT!!) For the generalized reaction, aA + bB rightarrow products, the rate equation is: Rate = k[A]^a [B]^b.Explanation / Answer
7. For the two reaction mechanisms shown above,
net reaction : 2O3 --> 2O2
Intermediate in mechanism 1 = O
Intermedate in mechanism 2 = O4
Molecularity of rate limiting step in mechanism 1 = 1
Molecularity of rate limiting step in mechanism 2 = 2
Rate law for the mechanism 1,
rate = k[O3]
Rate law for the mechanism 2,
rate = k[O3]^2
Mechanism 1 is consistent with the eperimentally determined rate law.
A mechanism must be consistent with the experimentally determined rate law. However, this does not prove that a mechanism is correct : True
Mechanisms are only a guess at how the reaction proceeds. A reaction mechanism consists of several steps and factors and this changes how a reaction proceeds and mechanism is thus not easy to prove.
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