## rate laws

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

LG2019
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

### rate laws

Do rate laws depend on the stoichiometric coefficients of the reactants in the balanced chemical equation?

LilyL1C
Posts: 24
Joined: Fri Sep 28, 2018 12:20 am

### Re: rate laws

No they do not. You can find the exponents of rate laws by comparing the rates of two reactions, or they will be given in an experimental rate law.

LG2019
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

### Re: rate laws

Ok cool thanks!

juliasloan_4g
Posts: 67
Joined: Fri Sep 28, 2018 12:28 am

### Re: rate laws

no the only way to find the rate law is with experimental data, not the equation on its own

Bruce Chen 2H
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: rate laws

it is a common misconception that they are. However, the stoichiometric coefficients are not used in the rate law. It should always be given or we will have experiments to use them.

riddhiduggal
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

### Re: rate laws

the stoichiometric coefficients actually aren't used in the rate law.

Maria Solis Disc 1G
Posts: 63
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 2 times

### Re: rate laws

I was told by my PLF that they are used only for elementary step rate laws