half life

$\frac{d[R]}{dt}=-k[R]^{2}; \frac{1}{[R]}=kt + \frac{1}{[R]_{0}}; t_{\frac{1}{2}}=\frac{1}{k[R]_{0}}$

Clarice Chui 2C
Posts: 101
Joined: Fri Aug 30, 2019 12:16 am

half life

How does half life of a reaction relate to kinetics?

Jason Wu 1E
Posts: 101
Joined: Thu Jul 25, 2019 12:15 am

Re: half life

The half-life of a reaction is the amount of time it takes for the initial concentration of half. It is related to kinetics with the equation t(1/2)=ln(2)/k where k is the reaction rate constant within a first order reaction.

Sydney Myers 4I
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Joined: Fri Aug 09, 2019 12:17 am

Re: half life

The equation for the half life of a reaction can be derived from its integrated rate law. The rate of the reaction has a direct effect on the half life of the reaction.

Ashley Wang 4G
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Joined: Wed Sep 11, 2019 12:16 am

Re: half life

Half life is inversely proportional to reaction rate. The larger the rate constant k, the shorter the half life.

Brandon Valafar
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Been upvoted: 1 time

Re: half life

The larger K is, the shorter the half life is. They are inversely related.

Niharika 1H
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Re: half life

First order reaction: t0.5 = 0.693/k
Second order reaction: t0.5 = 1/(k * A0)

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: half life

Half life is the time needed for concentration to fall to half its initial value. Half life is independent of initial concentration but is inversely related to the rate constant.