Editing Reaction rate constant (section)

== Units ==
The units of the rate constant depend on the overall [[order of reaction]].<ref>{{cite web| last=Blauch|first=David |title=Differential Rate Laws|url=http://www.chm.davidson.edu/vce/kinetics/differentialratelaws.html|work=Chemical Kinetics}}</ref>

If concentration is measured in [[Molar concentration#Units|units]] of mol·L<sup>−1</sup> (sometimes abbreviated as M), then
* For order (''m'' + ''n''), the rate constant has units of mol<sup>1−(''m''+''n'')</sup>·L<sup>(''m''+''n'')−1</sup>·s<sup>−1</sup> (or M<sup>1−(''m''+''n'')</sup>·s<sup>−1</sup>)
* For order zero, the rate constant has units of mol·L<sup>−1</sup>·s<sup>−1</sup> (or M·s<sup>−1</sup>)
* For order one, the rate constant has units of s<sup>−1</sup>
* For order two, the rate constant has units of L·mol<sup>−1</sup>·s<sup>−1</sup> (or M<sup>−1</sup>·s<sup>−1</sup>)
* For order three, the rate constant has units of L<sup>2</sup>·mol<sup>−2</sup>·s<sup>−1</sup> (or M<sup>−2</sup>·s<sup>−1</sup>)
* For order four, the rate constant has units of L<sup>3</sup>·mol<sup>−3</sup>·s<sup>−1</sup> (or M<sup>−3</sup>·s<sup>−1</sup>)