pseudo first order [ENDORSED]

[Ashley McClearnen 1B]

In pseudo 1st order rate laws, why are the reactants in large excess left out?

[Chem_Mod]

If one of the concentration is extremely large, then its concentration essentially remains unchanged. Thus the concentration for this item could be considered constant and be incorporated into the rate constant. As a result, it will look as if it were only a first order reaction.

[Marina Gollas 1A]

What is a pseudo first order rate law again? My TA tried to explain it, but I still didn't really understand it. Sorry if this is a dumb question.

[Megan_Ervin_1F]

You make the other concentrations so big that they are essentially viewed as constant so the rate law becomes "fake" first order

[Madison Hurst]

So is it technically a second order reaction, but because one of the concentrations is so big its basically constant?

[paytonm1H]

So is it technically a second order reaction, but because one of the concentrations is so big its basically constant?

it is pseudo first order with respect to the reactant you are focusing on, I think