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Topic: Need help on integrated rate law (Read 5731 times)
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san1984
Guest
Need help on integrated rate law
«
on:
April 17, 2006, 07:33:11 AM »
Hi,
please advise me on the computation for integrated rate law for this reaction :
A + B ---> product
we start from -d[A]/dt = k[A]
I ended up with ln([A]
/[A]o
o) = - kt
but I think there is something wrong in my integration. Please help. Thanks !
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Albert
Lonely Wanderer
Retired Staff
Sr. Member
Posts: 1050
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Re: Need help on integrated rate law
«
Reply #1 on:
April 17, 2006, 07:49:01 AM »
The correct integrated form is:
1/(
°
-[A]
°
) * ln (
*[A]
°
)/([A]*
°
) = kt
«
Last Edit: April 17, 2006, 08:03:48 AM by Albert
»
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Winga
Chemist
Full Member
Posts: 510
Mole Snacks: +39/-10
Re: Need help on integrated rate law
«
Reply #2 on:
April 17, 2006, 08:32:45 AM »
Let [A] = [A]o - x and
=
o - x,
d[A]/dt = -k([A]o - x)(
o - x)
d[A]/dt = -dx/dt
dx/dt = k([A]o - x)(
o - x)
Int. dx/([A]o - x)(
o - x) = Int. kdt
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san1984
Guest
Re: Need help on integrated rate law
«
Reply #3 on:
April 17, 2006, 09:49:08 AM »
oic ... Thanks for the prompt reply and great help !!
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Need help on integrated rate law