For a reaction of the form, A + B + C --> Products, the following observations are made: doubling the concentration of A increases the rate by a factor of 8, doubling the concentration of B has no effect on the rate, and doubling the concentration of C increases the rate by a factor of 2. Select the correct rate law for this reaction from the choices below.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter11: Chemical Kinetics: Rates Of Reactions
Section11.2: Effect Of Concentration On Reaction Rate
Problem 11.3PSP
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You and your lab partner are studying the rate of a reaction, A + B --> C. You make measurements of the initial rate under the following conditions:

 
Experiment [A] (M) [B] (M) Rate (M/s)
 
1 0.2 1.6  
2 0.4 1.6  



(a) Which of the following reactant concentrations could you use for experiment 3 in order to determine the rate law, assuming that the rate law is of the form, Rate = k [A]x [B]y? Choose all correct possibilities.

[A] = 0.8 and [B] = 1.6
[A] = 0.6 and [B] = 1.6
[A] = 0.2 and [B] = 4.8
[A] = 0.4 and [B] = 4.8
[A] = 1.0 and [B] = 1.6
[A] = 0.2 and [B] = 3.2
[A] = 0.4 and [B] = 3.2
[A] = 0.4 and [B] = 1.6






(b) For a reaction of the form, A + B + C --> Products, the following observations are made: doubling the concentration of A increases the rate by a factor of 8, doubling the concentration of B has no effect on the rate, and doubling the concentration of C increases the rate by a factor of 2. Select the correct rate law for this reaction from the choices below.

Rate = k[A][B][C]
Rate = k[A][C]    
Rate = k[A]2 [C]
Rate = k[A][C]2
Rate = k[A]2 [C]2
Rate = k[A]3 [C]
Rate = k[A][C]3
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