Quiz 2

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Quiz 2

Postby Sue_Park_2D » Thu Mar 16, 2017 6:00 pm

On the last question for quiz #2, I stated that the rate limiting step was step 2, but got it wrong.

I thought step 1 could not be the rate limiting step because it was at equilibrium, shown by the double arrows between the reactants and products. I don't understand why step 1 would have to be the rate limiting step instead of step 2.

Thank you!

Milan Hirpara 3K
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Joined: Sat Jul 09, 2016 2:00 am

Re: Quiz 2

Postby Milan Hirpara 3K » Thu Mar 16, 2017 6:06 pm

Just because the step shows the reaction is at equilibrium does not mean that step is the rate limiting step. Rate limiting step is determined by the slow step, so whichever step had the lower k, rate constant, is going to be the rate determining step.

SoJeong Lee
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Joined: Wed Sep 21, 2016 1:55 pm

Re: Quiz 2

Postby SoJeong Lee » Sat Mar 18, 2017 7:46 pm

Does anyone know the answer for quiz 2 #4-c which asks for the rate law?

Amber Duong 1B
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Joined: Wed Sep 21, 2016 1:55 pm

Re: Quiz 2

Postby Amber Duong 1B » Sat Mar 18, 2017 8:10 pm

The rate limiting step was the first step because its reaction constant was less than the second step, meaning that it was slower.

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