Le Chatelier’s principle states that if a stress is applied to a system at equilibrium, the system w

Le Chatelier’s principle describes how equilibrium systems respond to changes. When you disturb an equilibrium by changing concentration, pressure, or temperature, the system shifts to counteract that change.

Adding more reactants shifts equilibrium toward products to consume the extra reactants. Removing products shifts toward making more products to replace what was removed.

This principle helps chemists control reactions to produce more desired products. The system always works to restore equilibrium by opposing whatever stress is applied.