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Half-life of second order reactions

Posted: Mon Mar 05, 2018 12:26 am
by Nancy Le - 1F
Is the half-life of a second order reaction dependent or independent on reaction concentration?

Re: Half-life of second order reactions

Posted: Mon Mar 05, 2018 1:51 am
by Ya Gao
Half life of a second order reaction is dependent on the initial concentration since the the half life equals to 1/k[Ao]

Re: Half-life of second order reactions

Posted: Mon Mar 05, 2018 5:56 am
by RyanS2J
The half-life of a second order reaction is dependent on reactant concentration. The second order half-life is the time it takes for [A]t in 1/[A]t = 1/[A]o + kt to become half of [A]o. Substituting in [A]o/2 for [A]t yields that the half-life is 1/k[A]o. That is, the half life is inversely proportional to the initial concentration of the reactant A.