## Rate laws

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

chemstudent_1K
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

### Rate laws

Are differential rate laws used only for initial reaction rates?

Annie Qing 2F
Posts: 28
Joined: Fri Sep 25, 2015 3:00 am

### Re: Rate laws

From what I understand, I think for our purposes, yes.
While differential rate laws in theory simply is the rate as a function of concentration (and we could experimentally measure how the concentration measures in relation to time), the method of initial rates is the easiest. Because t is very close to 0, we know fairly accurately the concentration and the only unknowns are k and the exponents.
This makes for a doable calculation.