## Rate Constant Units

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

AlyssaPeckham1A
Posts: 49
Joined: Fri Sep 29, 2017 7:04 am

### Rate Constant Units

Could someone elaborate on how to find the units for different rate constants in a reaction?

SitharaMenon2B
Posts: 50
Joined: Thu Jul 27, 2017 3:01 am

### Re: Rate Constant Units

the units of the rate constant are determined by the order of a reaction. they can be determined by using the rate law for that order and the units of rate (mol/L.s) and concentration (mol/L).
for example, a first order reaction has rate=k[A], or k=rate/[A], so the units would be the unit of rate divided by the unit of concentration, which is (mol/L.s)/(mol/L)=s-1