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HW 15.23

Posted: Mon Mar 05, 2018 9:21 pm
by JennyCKim1J
For 15.23c, why is 'ln' not included in the equation? Since the equation that we start with is ln([A]t-[A]0)=-kt, I thought the equation we end up with should be ln[A]t=whatever?

Re: HW 15.23

Posted: Mon Mar 05, 2018 10:02 pm
by Gianna Apoderado 1B
You do end up using the natural log (ln) in this calculation, after you solve for the [A]t! After you get that value, you plug it in
k = (ln([A]0/[A]t)) / t to get k.

Re: HW 15.23

Posted: Mon Mar 05, 2018 10:02 pm
by Curtis Tam 1J
In the solutions manual, they were first trying to determine what the concentration of [A]t was before using the first order rate law equation.