## Pseudo Rate Laws

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

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Joined: Sat Aug 17, 2019 12:15 am

### Pseudo Rate Laws

What does the word pseudo denote in the context of pseudo rate laws?

Andrew Liang 1I
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

### Re: Pseudo Rate Laws

It means that in the reaction we are assuming all the reactants except 1 to be large excesses, and therefore, constants.
For example: A+B+C --> P
we assume B and C are large excess and so the pseudo 1st order rate law would just be kprime[A], where kprime = k[B][C]