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Rate Laws - Pseudo-Order

  • #1

Homework Statement


2A + 2B -> C +D
where rate = k [A] ^2
[A]_0 = .000443 M
_0 = 1.69 M
A plot of ln [A] vs time has a slope of -9.87. What will the rate of this reaction be when [A]==1.412 M?


Homework Equations





The Attempt at a Solution


From given information, this is pseudo-first order. So slope=-k so k = 9.87 but this is pseudo-order so k'= 9.87

rate= k' [A]
k' = k ^2 --> k = k' / ^2 and I plug in the values for k' and = 1.412 and I get the wrong answer. The answer should be 9.73 M/s
 

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