Categories Every Day Science At equilibrium, as long as the volume of the container and the temperature of the chemical system remains unchanged, the concentrations of reactants and products? Post author By esimpk Post date June 21, 2021 A. Changes B. Keep on changing C. Do not change D. Is fixed ← The change of concentrations of reactants and products with time is called? → At the beginning the concentrations of reactants and products change?