## Reaction Orders

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Joonsoo Kim 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

### Reaction Orders

My TA mentioned that reactions don't necessarily have to be positive whole numbers; you can have negative numbers or fractions. When is this the case? Why are reaction orders commonly whole numbers like 0, 1, and 2?

MichelleRamirez_2F
Posts: 63
Joined: Fri Sep 28, 2018 12:28 am

### Re: Reaction Orders

In the textbook it is mentioned how the reaction order can be a negative number=negative order . This would signify that the concentration value of the species is in the denominator of the rate law. The species in this case is usually a product and it represents the reverse reaction.