In this course, you will focus on dynamic equilibria in chemical systems.

A chemical system is considered to be in "dynamic equilibrium" when the forward and reverse reactions are occurring at the same rate. This means that the concentrations of the reactants and products do not change with time. This does not mean that the concentrations of the reactants and products are equal; rather, it means that their concentrations are unchanging because the forward and reverse reactions are occurring at equal rates. In a chemical system at equilibrium, nothing appears to be happening at the macroscopic (observable) level. However, changes are occurring at the microscopic level.