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Miranda 1J
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Joined: Fri Sep 29, 2017 7:06 am


Postby Miranda 1J » Wed Mar 07, 2018 12:06 am

a) A -> B, given that the concentration of A decreases to one-half its initial value in 1000s determine the rate constant expressed for the rate loss of A ... I feel like this is simpler than the question is making it seem but I'm getting confused, can someone tell me how to go about this?

Hubert Tang-1H
Posts: 44
Joined: Thu Jul 27, 2017 3:00 am

Re: 15.23

Postby Hubert Tang-1H » Wed Mar 07, 2018 9:21 am

Since this is a first order reaction, we can use the first order half life equation

t_(1/2)=ln 2/k

We know that the half-life is 1000s, so what we need to do is calculate for k

k=ln 2 /t_(1/2)=0.693/1000 s = 6.93x10^-4 s^-1

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