Lecture_Notes_083109b

# Lecture_Notes_083109b - -3 M/s 2 3 s 200 s 1 9 86 s 2 86 6...

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1 st Order Reaction y How many minutes does it take for 25% of the C 3 H 6 to react?

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2 nd Order Reaction
Half-Life of a 2 nd Order Reaction

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2 nd Order Reaction y Butadiene (C 4 H 6 ) reacts with itself to form a dimer with the formula C 8 H 12 . The reaction is second order in C 4 H 6 . The rate constant at a particular temperature is 4.0 x 10 -2 M -1 s -1 and the initial concentration of C 4 H 6 is 0.200 M. { What is the molarity of butadiene after a reaction time of 1.00 h?
2 nd Order Reaction y What is the half life of the reaction under the above conditions? y How many minutes will it take for the concentration of C 4 H 6 to drop from 0.0100 M to 0.0050 M?

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Zero Order Reaction
Half-Life for a Zero Order Reaction

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A reaction is zero order in A. How long will is take for the concentration of A to decrease from 0.86 M to 0.43 M? The rate constant is 5.00 x 10

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Unformatted text preview: -3 M/s. 2 3 s 200 s 1 9 86 s 2% 86% 6% 6% 1. 233 s 2. 200 s 3. 139 s 4. 86 s Reactions with More Than One Reactant y For the reaction: { BrO 3-(aq) + 5 Br-(aq) + 6 H + (aq) → 3 Br 2 (l) + 3 H 2 O (l) y Rate = -∆ [BrO 3-]/ ∆ t = k[BrO 3-][Br-][H + ] 2 y to find k, take an experiment where the concentrations of two of the reactants are much higher than the other reactant, can find k’ and solve for k Reactions with More Than One Reactant y For the reaction: { BrO 3-(aq) + 5 Br-(aq) + 6 H + (aq) → 3 Br 2 (l) + 3 H 2 O (l) y Rate = -∆ [BrO 3-]/ ∆ t = k[BrO 3-][Br-][H + ] 2 y find k when [H + ] o = 1.00 x 10-4 M, [Br-] o = [BrO 3-] o = 0.500 M and after 9.5 s [H + ] = 5.00 x 10-5 M Integrated Rate Law: Summary...
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## This note was uploaded on 10/14/2009 for the course CHEM 105BLG at USC.

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Lecture_Notes_083109b - -3 M/s 2 3 s 200 s 1 9 86 s 2 86 6...

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