CHEMISTRY COMMUNITY

What is the difference between k' and ?

K' is reverse reaction

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.

k' is the rate of the reverse reaction. kr is the rate constant of a reaction that depicts the rate of a chemical reaction.

K’ is the rate of the reverse reaction. kr is the rate constant of the reaction

K’ is the rate of the reverse reaction which equals Kr

Additionally, kr/k prime=K, the equilibrium constant.

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

K' is the rate constant for the reverse reaction which is why k/k' is the equilibrium constant K

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

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.

k' is the rate of the reverse reaction.

to clarify, reverse rate means the reciprocal. k'=1/k

k' is just for the reverse reaction and kr is for the forward reaction.