Final answer:
Le Chatelier's Principle enables us to predict shifts in an equilibrium system by determining the direction of shift in response to a stress applied to the system at equilibrium.
Step-by-step explanation:
Le Chatelier's Principle is the principle that enables us to predict shifts in an equilibrium system. According to Le Chatelier's Principle, when a stress is applied to a system at equilibrium, the equilibrium will shift in a direction to partially counteract the stress and reach a new equilibrium. This principle can be used to predict the direction of shift for changes in concentrations, temperature, or pressure.