## K2K1/K' Formula

$K = \frac{k_{forward}}{k_{reverse}}$

Maria1E
Posts: 61
Joined: Sat Jul 22, 2017 3:01 am

### K2K1/K' Formula

Can someone please explain the (k2k1)/k' formula, and give examples of when we would use it? Thank you!

Ashley Davis 1I
Posts: 57
Joined: Fri Sep 29, 2017 7:04 am

### Re: K2K1/K' Formula

I think Dr. Lavelle will go into this on Friday, or at least in coming lectures, since we haven't worked on any of it yet.

Curtis Tam 1J
Posts: 105
Joined: Thu Jul 13, 2017 3:00 am

### Re: K2K1/K' Formula

I believe it has something to do with simplifying the rate law by assuming that all reactants are in great excess except for one, which will be used to determine the rate of reaction. If something is in great excess, then some time later, it will have minimal change relative to reactants that are in more minimal amounts. Only the reactant with the noticeable change in concentration will be analyzed.

Juanyi Tan 2K
Posts: 33
Joined: Fri Sep 29, 2017 7:05 am

### Re: K2K1/K' Formula

Pseudo-1st-order reaction is one example, which is the circumstance where a second order reaction appears to be first order. That is when one of the reactants in the rate equation is present in great excess over the other in the reaction mixture. So the rate constant of one of the reactants combines with that of another reactants to create the rate constant for the pseudo-1st-order reaction.