Page 1 of 1

k

Posted: Wed Mar 07, 2018 2:56 am
by Kellina Tran 2I
How exactly do we use the slope of a reaction graph to determine the rate constant k?

Re: k  [ENDORSED]

Posted: Wed Mar 07, 2018 7:59 am
by Chem_Mod
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.

Re: k

Posted: Wed Mar 07, 2018 10:39 pm
by Jessica Wakefield 1H
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.