F the following mechanism has been proposed for the

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Unformatted text preview: mol L−1)2 = 3.13 × 10−2 mol L−1 sec−1 One point is earned for the correct answer, including units. (f) The following mechanism has been proposed for the reaction. Step 1: Step 2: B+B → E+D → E+A ← B+C slow fast equilibrium Provide two reasons why the mechanism is acceptable. (1) When steps 1 and 2 are added together, the overall reaction is A + B → C + D. This is the stoichiometry that was given for the overall reaction. (2) The rate-determining step (slow step) is consistent with the rate law because only reactant B occurs in the rate law and it occurs to the power of 2, which is the number of B molecules colliding in the rate-determining step. (3) The rate-determining step is consistent with the rate law because A is absent from the rate-determining step and the reaction is zero order—i.e., reactant A does not appear in the rate law. One point is earned for each correct reason, with a maximum of 2 points. (g) In the mechanism in part (f), is species E a catalyst, or is...
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This note was uploaded on 05/05/2011 for the course CHEM 504 taught by Professor John during the Fall '11 term at American College of Computer & Information Sciences.

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