Consider the reaction of A -> Products.
The rate of this reaction is defined as the
negative time rate of change of the reactant concentration or
If the reaction had a more complicated stoichiometry, it will still have a rate that can be
defined in terms of any one of the reagents or products.
For instance, if a reaction 2A + 3B -> C + 4D is observed, the rate of that reaction is defined
as:
The kinetics of any reaction depend on the reaction mechanism, or rate law, and the initial
conditions. If we assume for the reaction A -> products there is there is an
initial concentration of reactant of [A]0 at time t=0,
and the rate law is an integral order in A, then we can summarize the kinetics of the
reaction as follows: