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Kellina Tran 2I
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Postby Kellina Tran 2I » Wed Mar 07, 2018 2:56 am

How exactly do we use the slope of a reaction graph to determine the rate constant k?

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Postby Chem_Mod » Wed Mar 07, 2018 7:59 am

This depends on what order of reaction you are plotting. If the reaction is zero order, then you plot [A]t vs. t and the slope should equal -k. For first order, you would plot ln[A]t vs. t and the slope is -k. 2nd order, 1/[A]t vs. t plots yield a slope of k itself.

Jessica Wakefield 1H
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Re: k

Postby Jessica Wakefield 1H » Wed Mar 07, 2018 10:39 pm

because your integrated rate laws can be viewed in the form of y=mx+b and k is in the place of m, you regard k as your slope. depending on the order, k will be positive or negative.

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