## Coefficients in rate laws

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

Delour Haj 3J
Posts: 21
Joined: Wed Sep 21, 2016 2:57 pm

### Coefficients in rate laws

Is there ever a time when one should take the coefficient that is in front of a reactant in an equation, and use it as an exponent for that reactant in the equation's rate law? Is there a rule regarding taking the coefficients and using them as the exponent as well?

Aishwarya_Natarajan_2F
Posts: 11
Joined: Mon Jul 11, 2016 3:00 am

### Re: Coefficients in rate laws

You would only use coefficients as exponents when writing rate laws for elementary steps of a reaction mechanism, otherwise coefficients cannot be used to write a rate law.