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Topic: Physical chem - reaction rate  (Read 2693 times)

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Offline bu2012

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Physical chem - reaction rate
« on: December 13, 2011, 10:24:47 AM »
The hydrolysis of 1-chloro-1-methylcyloundecane in 80% ethanol has
been studied at 25 C. The extent of hydrolysis was measured by titrat-
ing the acid formed after measured intervals of time with a solution of
NaOH. The data are as follows on the volumes of NaOH required.
t, hr           0          1.0        3.0         5.0       9.0        12       infinity
x, ml        0.035     0.295     0.715     1.055     1.505    1.725     2.197

1. What is the order of the reaction?
2. What is the value of the rate constant?
3. What fraction of the 1-chloro-1-methylcycloundecane will be left
unhyrolyzed after 8 hours?

I am unsure how to start this problem to find the order of reaction without being given an equation. I'm not sure if there is a formula I can use in order to find this. I've always been told to use the initial rate method, but there is no rate given.

Update: I know rate is concentration over time, so do I need to find the average rate in order to proceed? If so, I'm not sure how to using infinity.

Offline Borek

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Re: Physical chem - reaction rate
« Reply #1 on: December 13, 2011, 02:24:19 PM »
If you are looking for order, you have to check how you can linearize the plot - so average rate will be of no use.

What kind of a compound 1-chloro-1-methylcyloundecane is? What does it hydrolyze into?
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