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Topic: Analytical/kinetics question involving autolysis of water  (Read 4452 times)

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Offline sdp

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Analytical/kinetics question involving autolysis of water
« on: September 26, 2008, 08:15:41 PM »
Hi,

I've just discovered these forums and I hope to stick around and help out. However, for now, there's a homework problem for my analytical class that I'm stumped on. It's very much a random question as it doesn't seem to pertain to anything that we've been covering in lecture. The problem goes like this:

"In the autolysis of water reaction: H2O<=> H+ + OH-, the reverse reaction rate, k2, is 1.35e11 L mol-1s-1. Assuming pKw=14, What is the forward reaction rate, k1? Note, the forward rate is k1*[H2O] = k1*55.6.[__________] s-1"

Any guidance is welcomed and all responses are appreciated.

Thanks.

Offline Borek

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Re: Analytical/kinetics question involving autolysis of water
« Reply #1 on: September 27, 2008, 04:01:24 AM »
Kinetic approach to equilibrium tells you, that equilibrium happens when rates of forward and backward reactions are identical. Write expressions for forward and backward reactions and compare them to the reaction quotient.
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