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Rate and equilibrium constants

Posted: Sat Mar 17, 2018 12:35 am
by allyz1F
Do the same conditions change both the equilibrium constant and the rate constant in the same ways? As in if one property affects one, can it be automatically deduced that it affects the other?

Re: Rate and equilibrium constants

Posted: Sat Mar 17, 2018 1:21 am
by Christiana2D
No, there are some factors that will affect the rate constant of a reaction but not the equilibrium constant. For example, a catalyst may increase the rate of a reaction, but the equilibrium constant will stay the same. This is because the equilibrium constant is the proportion of the forward and reverse rates which will both be affected equally. On the other hand, factors like temperature CAN affect both the equilibrium constant and the rate constant.

Re: Rate and equilibrium constants

Posted: Sat Mar 17, 2018 3:42 am
by Clarissa Molina 1D
Do we use K=k/k' when there is only one step in a mechanism and K=(k1/k1') x (k2/k2') x ... when there are multiple steps?

Re: Rate and equilibrium constants

Posted: Sat Mar 17, 2018 12:59 pm
by allyz1F
Clarissa Molina 1D wrote:Do we use K=k/k' when there is only one step in a mechanism and K=(k1/k1') x (k2/k2') x ... when there are multiple steps?

Yes that is correct