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O 2/23/2017 11:55 PM A 93.3/100 2/23/2017 03:02 PM Gradebook Print Calculator Periodic Table Incorrect Incorrect X Incorrect Incorrect X Incorrect X Question 10 of 15 incorrect Map Ca Sapling Learning macmillan learning Consider the following mechanism step 1 A FA B+ C equilibrium step 2 C D E slow overall: A D B+ E Determine the rate law for the overall reaction (where the overall rate constant is represented as k). k A D rate Incorrect. For an elementary step, the stoichiometry of a reaction determines its rate law, but that's not true for an overall reaction Instead, the rate law for an overall reaction is based on the slowest step in the mechanism.Explanation / Answer
Rate law is determined only based on the slowest step of the mechanism.
the mechanism of the reaction is
A <-------> B + C
C + D ------> E slow
For the first reaction Keq = [B][C] /[A] or [C] = Keq. [A]/[B]
and rate law = k2. [C] [D]
= k2. Keq.[A][D]/[B]
= k[A][D]/[B]
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