Question
Asked Nov 26, 2019
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From the reaction data below, determine whether the reaction is first-order or second-order and calculate the rate constant. See the table in the image.

 

From the reaction data below, determine whether the reaction is first order or second order and
calculate the rate constant.
Time (s)
Reactant (mM)
0
5.4
1
4.6
2
3.9
3
3.2
2.7
2.3
5
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From the reaction data below, determine whether the reaction is first order or second order and calculate the rate constant. Time (s) Reactant (mM) 0 5.4 1 4.6 2 3.9 3 3.2 2.7 2.3 5

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Expert Answer

Step 1

The integrated rate law for zero-order (1), first-order (2), and second-order (3) reaction are given below as equation in which [A] is the concentration of reactant at time t, [A]o is the initial concentration of the reactant, and k is rate constant of the reaction.

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[A] [A -kt (1) In[A] n[A-kt .) 1 1 +kt(3 [A] [A

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Step 2

The graphs, [A] vs t, ln[A] vs t, and 1/[A] vs t are plotted. It is found that the graph between ln[A] and t is a straight line. A first-order reaction gives ...

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In[A A] (mM) t(s) 5.4 1.686 1 4.6 1.526 2. 3.9 1.361 3.2 1.163 2.7 4 0.993 0.833 5 2.3 In[A] vs t 1.8 1.6 14 1.2 1 0.8 0.6 0.4 0.2 0 1 2 6 t(s) un t

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