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Half life of 1st-Order Reaction

Posted: Sun Mar 10, 2019 8:51 pm
by Fionna Shue 4L
Conceptually, why does the half life of a first order reaction not depend on the initial concentration?

Re: Half life of 1st-Order Reaction

Posted: Sun Mar 10, 2019 9:01 pm
by Danielle_Gallandt3I
I think it is because it is actually proportional to the rate constant k (so it is dependent on the environment, temp activation energy, etc). Another way to think about this is that a second half life takes the same amount of time as the first half life would, even though there is half the original concentration.

Re: Half life of 1st-Order Reaction

Posted: Sun Mar 10, 2019 9:10 pm
by dgerges 4H
because half life of any quantity of a first order reaction is the same, it'll take the same time to halve no matter how much it started with