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APkineticsPractice0809

APkineticsPractice0809 - AP Chemistry Chemical Kinetics...

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AP Chemistry - Chemical Kinetics Name: ________________________________ Date: _______________ Period: _____ 1. After five half-life periods for a first order reaction, what fraction of reactant remains? 2. If you plot 1/[reactant] versus time and observe a straight line, what is the order of the reaction? If ln[reactant] is plotted versus time, and a straight line of negative slope is observed, what is the order of the reaction? 3. Indicate whether each of the following statements is true or false. Change the wording of each false statement to make it true. a. In stepwise reactions the rate-determining step is the slow one. b. It is possible to change the rate constant for a reaction by changing the temperature. c. As a first order reaction proceeds at a constant temperature, the rate remains constant. d. The rate constant for a reaction is independent of reactant concentrations. 4. For each reaction below give the relative rates of formation of products and disappearance of reactants using coefficients and rate change symbols. a. 2O 3(g) 3O 2(g) b. 2HOF (g) 2HF (g) + O 2(g) c. N 2(g) + 3H 2(g) 2NH 3(g) 5. The reaction CO (g) + NO 2(g) CO2 (g) + NO (g) is second order in NO 2
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