Dynamic chemical equilibrium

A reversible reaction reaches dynamic equilibrium when forward and reverse reaction rates are equal. Both reactions continue, but macroscopic concentrations stay constant in a closed system under unchanged conditions. Equal rates do not require equal reactant and product concentrations. Imagine conversion between two molecular forms. At equilibrium, the same amount changes in each direction per second, even if one form is much more abundant. Equilibrium describes a balance of processes, not a stopped reaction.