Question

When does a chemical reaction reach equilibrium?

Answer 1

A chemical reaction reaches equilibrium when products and reactants are being formed at the same rate.

Explanation:

The chemical reaction is in a steady state, when the products and reactants concentrations are constant, the ratio is constant. Equilibrium occurs when the chemical reactions do not transform all reactants into products: most of the reactions achieve equilibrium or dynamic balance that contains both reagents and products. Another way to define equilibrium is by saying that the system is in equilibrium and the forward and backward reaction happen in the constant rate.

Equilibrium, not necessarily refer that the reagents and products are the same. This means that reaction reaches the point where their concentrations will not vary over time because the forward and backward reaction resemble the same. For example, the below displayed response or system is in balance. Reactor A is in equilibrium with product B by a simple chemical equation.

                             $A \rightleftharpoons B$