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Unformatted text preview: is multiplied by 4, and the initial reaction rate is multiplied by 16. This means that the reaction is second order with respect to B. One point is earned for the correct order and for the justification. (c) Write the rate law for the overall reaction. rate = k [B]2 One point is earned for the correct rate law (or a rate law consistent with the answers in part (a) and part (b)). © 2008 The College Board. All rights reserved. Visit the College Board on the Web: www.collegeboard.com. AP® CHEMISTRY 2008 SCORING GUIDELINES (Form B)
Question 2 (continued)
(d) Determine the value of the rate constant, k , for the reaction. Include units with your answer. Using experiment 2: rate = k [B]2 k=
rate 6.67 × 10−4 mol L−1 sec −1 = = 0.577 M −1 sec−1 [B]2 (0.034 mol L−1 )2 One point is earned for the correct numerical value of the rate constant. One point is earned for the correct units. (e) Calculate the initial reaction rate for experiment 4. rate = k [B]2 rate = (0.577 M −1 sec−1) × (0.233...
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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.
- Fall '11