103B PS 2 - CHEMISTRY 103B, Sections 1-4 Page 1 CHEMISTRY...

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Page 1 CHEMISTRY 103B, Sections 1-4 4/10/2008 12:14:00 AM http://www.chem.arizona.edu/~kellerp/ps-answers/PS2an/PS2an.htm CHEMISTRY 103B Problem Set 2: 14 Points Answer Key Problem1. (11 points) Allparts of thisproblemreferto the reactionshowninproblem2 of the firstproblemset. Theelementarysteps and theirrelativerates are shownbelow: 2A 3 3A 2 Veryslow A 2 +B 2 A 2 B 2 Veryfast A 2 +A 2 B 2 A 4 B 2 Veryfast A 2 +C 2 A 2 C 2 Veryfast A 2 C 2 +A 4 B 2 2A 3 BC Veryfast (a) Is the rate determiningstep zeromolecular , unimolecular , bimolecular , trimolecular ,or tetramolecular ? BIMOLECULAR . Theslowstep involvesthe collisionof two molecules . (b) At the start of the reactionthe concentrationof each reactantwas 0.05000 mol/L and thatof the finalproductwas 0.00000 mol/L. After174 seconds, the concentrationof A 3 had dropped to 0.03500 mol/L. Whatisthe rate constantk forthisreaction?
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Page 2 CHEMISTRY 103B, Sections 1-4 4/10/2008 12:14:00 AM http://www.chem.arizona.edu/~kellerp/ps-answers/PS2an/PS2an.htm
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This note was uploaded on 04/10/2008 for the course CHEM 103B taught by Professor Keller during the Spring '08 term at University of Arizona- Tucson.

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103B PS 2 - CHEMISTRY 103B, Sections 1-4 Page 1 CHEMISTRY...

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