Final answer:
In a chemical reaction at equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction. When the rate of the forward reaction stays the same, it means that the concentrations of both reactants and products remain constant, indicating that the system is at equilibrium.
Step-by-step explanation:
In a chemical reaction at equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction. This means that the forward and reverse reactions are happening at the same rate. When the rate of the forward reaction stays the same, it means that the concentrations of both reactants and products remain constant, indicating that the system is at equilibrium.