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### k' vs kr

Posted: Mon Mar 09, 2020 12:34 am
What is the difference between k' and $k_{r}$?

### Re: k' vs kr

Posted: Mon Mar 09, 2020 12:44 am
K' is reverse reaction

### Re: k' vs kr

Posted: Mon Mar 09, 2020 1:21 am
K' represents the placeholder K that is used in psuedo order reactions when the rate law is simplified to only include one species at reaction. For example, if the rate law of a reaction was k[A][B][C] and we wanted to isolate the changes affecting species A, then we could shorten and truncate the rate law into k'[A] where k' is equal to k[B][C]. This is so that it simplifies the equation and turns it into a psuedo first order rate law.

### Re: k' vs kr

Posted: Mon Mar 09, 2020 9:02 am
k' is the rate of the reverse reaction. kr is the rate constant of a reaction that depicts the rate of a chemical reaction.

### Re: k' vs kr

Posted: Mon Mar 09, 2020 11:39 am
K’ is the rate of the reverse reaction. kr is the rate constant of the reaction

### Re: k' vs kr

Posted: Mon Mar 09, 2020 12:05 pm
K’ is the rate of the reverse reaction which equals Kr

### Re: k' vs kr

Posted: Mon Mar 09, 2020 5:03 pm
Additionally, kr/k prime=K, the equilibrium constant.

### Re: k' vs kr

Posted: Mon Mar 09, 2020 5:24 pm
kr is the rate constant of the reaction, while k' is the rate of the reverse reaction, their relation can be shown as kr/k'=K

### Re: k' vs kr

Posted: Tue Mar 10, 2020 7:36 pm
K' is the rate constant for the reverse reaction which is why k/k' is the equilibrium constant K

### Re: k' vs kr

Posted: Wed Mar 11, 2020 12:09 am
Is k’ and k prime have to be positive right? Like just because k’ is the reverse reaction doesn’t mean it has a negative sign

### Re: k' vs kr

Posted: Wed Mar 11, 2020 12:17 am
ShastaB4C wrote:Is k’ and k prime have to be positive right? Like just because k’ is the reverse reaction doesn’t mean it has a negative sign

Yes, it always has to be positive because the Arrhenius Equation is always positive.

### Re: k' vs kr

Posted: Wed Mar 11, 2020 12:39 am
k' is the rate of the reverse reaction.

### Re: k' vs kr

Posted: Wed Mar 11, 2020 7:37 am
to clarify, reverse rate means the reciprocal. k'=1/k

### Re: k' vs kr

Posted: Wed Mar 11, 2020 7:50 am
k' is just for the reverse reaction and kr is for the forward reaction.