Reaction rate





The reaction rate of a chemical reaction, that is, the speed of production
of products or reactants, may generally be expressed as rate = k [a]^x where
[a] is the molar concentration of reactant (there may be several), x is the
order for that reactant, and k is a constant. Order establishes the
mathematical relation of concentration to rate; eg. for an order of 2, if
the concentration doubles, the rate quadruples.

Rate is often expressed in mols per liter-second.