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### pseudo rate law

Posted: Thu Mar 14, 2019 11:16 pm
can someone please explain pseudo rate law and why it's important

### Re: pseudo rate law

Posted: Thu Mar 14, 2019 11:22 pm
I was wondering the same thing. Dr.Lavelle mentioned it during class, but I am still confused.

### Re: pseudo rate law

Posted: Thu Mar 14, 2019 11:59 pm

### Re: pseudo rate law

Posted: Sun Mar 17, 2019 1:00 am
So the pseudo rate law just allows easier analysis of the effect of one reactant. In this case, the other reactant(s) are in high concentration that they can be considered constant, and so k[high conc. reactant] is k'

### Re: pseudo rate law

Posted: Sun Mar 17, 2019 1:06 am
its more theoretical for a lab situation. we dont have any calculations with this i dont think

### Re: pseudo rate law

Posted: Sun Mar 17, 2019 1:18 am
Pseudo rate law is just a method used to simplify second order reactions that have more than one reactants. You basically take one reactant in a very high concentration, so the second reactant seems insignificant compared to it and doesnt have a big impact on the rate law of the equation. Therefore the reaction can technically behave like a first order, though practically it is a second order reaction. Its done to make calculations easier.

### Re: pseudo rate law

Posted: Sun Mar 17, 2019 9:08 am
How would we know if the reactant is in excess? Would that be told to us or would we just have to ballpark it based on looking at the concentration?

### Re: pseudo rate law

Posted: Sun Mar 17, 2019 9:13 am
We will be told I believe