If rateforward = ratereverse
then
kforward[reactants]m = kreverse[products]n
=
= Keq
(the equilibrium constant)
The exponents, m and n, are equal to the coefficients in the balanced chemical equation. Note that this is equilibrium, not kinetics. The rates of the forward and reverse reactions are equal, not the concentrations of reactants and products.
This is also known as the Law of Mass Action.
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