Lecture_Notes_090209b

Lecture_Notes_090209b - Lecture Note 9/2/2009

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Iodine Clock Reaction 15.0 12.5 10.0 7.5 5.0 mL NaIO 3 Time (s) ln (mL NaIO 3 ) 1/(mL NaIO 3 )
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What do you think is the order of the iodine clock reaction? 0 1 2 3% 5% 92% 1. 0 2. 1 3. 2
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Rate Definition
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Rate Definition
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Reaction Mechanism y Reaction Mechanism – the series of steps taken for a reaction to take place y Intermediate – any substances that is produced in one step and consumed in a later step and does not appear in the overall reaction y Molecularity – the number of molecules that must collide to produce the given reaction
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Reaction Mechanism y Elementary Steps – steps whose rate law can be written from their balanced molecular equation
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Reaction Mechanism y Two conditions must be satisfied to have an appropriate reaction mechanism. y 1. Elementary steps must add up to give the overall reaction. y 2. The rate law of the rate determining (slowest) step must agree with the experimentally determined rate law.
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Reaction Mechanism y Consider the following mechanism for the reaction of hydrogen with
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Lecture_Notes_090209b - Lecture Note 9/2/2009

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