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KineticsProblem - Experiment 1 2 3 4[A 0.100 0.300 0.100...

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Experiment [A] [B] Rate 1 0.100 0.100 5.00 2 0.300 0.100 45.0 3 0.100 0.200 ???? 4 0.300 0.200 90.0 1) To find the order of reaction with respect to [A], use two experiments where [B] is held constant and [A] changes: for example, you can use experiments 1 and 2 where [A] is tripled while [B] is held constant, resulting in a 9-fold increase in the rate: This means that the reaction is 2nd-order with respect to [A], because the 3-fold increase in [A] results in a 9-fold increase in the rate, and 3 2 = 9. 2) Or, you could find the order of reaction with respect to [B] by using two experiments where [A] is held constant and [B] changes: for example, you can use experiments 2 and 4 where [B] is doubled while [A] is held constant, resulting in a doubling (2-fold increase) in the rate: This means that the reaction is 1st order with respect to [B], because the 2-fold increase in [B] results in a 2-fold increase in the rate, and 2 1 = 2. 3) To find the ???? rate above, just use the order of reaction with respect to either [A] or
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