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Ch.14 - Chemical Kinetics
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All textbooksBrown 14th EditionCh.14 - Chemical KineticsProblem 108b

Chapter 14, Problem 108b

Ozone in the upper atmosphere can be destroyed by the following two-step mechanism: Cl1g2 + O31g2¡ClO1g2 + O21g2 ClO1g2 + O1g2¡Cl1g2 + O21g2 (b) What is the catalyst in the reaction?

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Welcome back everyone in this example, we're given the below proposed mechanism and were given three steps in this mechanism. We need to determine what our catalyst is. So we should recall that a catalyst is going to be a reactant in one step and then it's going to be a product in another. And so what we should recognize is our steps of our mechanism here. So we have the silver plus one, carry on reacting with a CCM four plus Catalan to produce a silver two plus Catalan and a CCM three plus Catalan. Moving on to step two, we have a thallium plus one. Catalan reacting with a silver two plus, carry on to produce Valium two plus and a silver plus one carry on. And we should instantly recognize that we have silver plus one as a carry on being consumed as a reactant in step one of our mechanism, whereas in step two of our mechanism, the silver plus one carry on is produced as a product. And so we have already identified our catalyst here. So in step one, we want to say that a G plus one is being consumed as a reactant and then step two, we have a G plus one being produced. And so we would say that therefore our catalyst is the silver plus one county on. So this here would be our final answer to complete this example. So I hope that everything I reviewed was clear. If you have any questions, please leave them down below and I will see everyone in the next practice video
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The following mechanism has been proposed for the reaction of NO with H2 to form N2O and H2O: NO1g2 + NO1g2¡N2O21g2 N2O21g2 + H21g2¡N2O1g2 + H2O1g2 (d) The observed rate law is rate = k3NO423H24. If the proposed mechanism is correct, what can we conclude about the relative speeds of the first and second reactions?

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Textbook Question

The gas-phase decomposition of ozone is thought to occur by the following two-step mechanism.

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The gas-phase decomposition of ozone is thought to occur by the following two-step mechanism.

Step 1: O3(g) ⇌ O2(g) + O(g) (fast)

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