Dynamic equilibrium is defined as a state of balance in which the rates of the forward and reverse reactions are equal. This means that while the reactions continue to occur, there is no net change in the concentrations of reactants and products over time.
In a dynamic equilibrium, both the forward and reverse reactions are still happening, but they occur at the same rate. This balance ensures that the system remains stable, with no overall change in the amounts of reactants and products.
For example, consider a closed container with water. At a certain temperature, the rate at which water evaporates equals the rate at which water vapor condenses. This results in a dynamic equilibrium where the amount of liquid water and water vapor remains constant.
Therefore, the correct statement is: a state of balance in which the rates of the forward and reverse reactions are equal.