Question

which statement is true about a chemical reaction at equilibrium?select one:the forward reaction has reached completion.the mass of the products is equal to the mass of the reactants.the forward reaction rate is equal to the reverse reaction rate.the reverse reaction has reached completion.

Answer 1

The true statement about a chemical reaction at equilibrium is that the forward reaction rate is equal to the reverse reaction rate, defining a dynamic equilibrium.

Step-by-step explanation:

The statement that is true about a chemical reaction at equilibrium is that the forward reaction rate is equal to the reverse reaction rate. This condition describes a dynamic equilibrium where although the reactions continue to occur, the overall concentrations of reactants and products remain constant because the rate at which reactants are converted to products is balanced by the rate at which products revert to reactants. It's crucial to understand that at equilibrium, neither the forward nor reverse reactions have reached completion, and the masses of the products and reactants are not necessarily equal, but their rates of reaction are.