Which is a property of a reaction that has reached equilibrium?
Which is a property of a reaction that has reached equilibrium?
- A) The amount of products is greater than the amount of reactants
- B) The amount of products is equal to the amount of reactants
- C) The rate of the forward reaction is greater than the rate of the reverse reaction
- D) The rate of the forward reaction is equal to the rate of the reverse reaction
Correct Answer: D) The rate of the forward reaction is equal to the rate of the reverse reaction
Explanation
A chemical reaction reaches equilibrium when the rate of the forward reaction and the rate of the reverse reaction become equal. At this point, the concentrations of the reactants and products remain constant, but they don't necessarily have to be equal. Therefore, the correct answer is:Option D: The rate of the forward reaction is equal to the rate of the reverse reaction.
It's important to understand that at equilibrium, the reaction doesn't stop, but the forward and reverse reactions continue to occur at the same rate. This means that the amount of reactants and products in the system remains constant over time, but not necessarily equal to each other.
Also, note that the equilibrium constant, K, is a value that can help describe the position of the equilibrium. It is the ratio of the concentrations of the products to the concentrations of the reactants, each raised to the power of their respective stoichiometric coefficients. The value of K gives an indication of how much products or reactants are favored at equilibrium. If K > 1, the products are favored, and if K< 1, the reactants are favored.