7.9.A—Identify the response of a system at equilibrium to an external stress, using Le Châtelier's principle

Identify the response of a system at equilibrium to an external stress, using Le Châtelier's principle.

• Le Châtelier’s principle can be used to predict the response of a system to stresses such as addition or removal of a chemical species, change in temperature, change in volume/ pressure of a gas-phase system, or dilution of a reaction system.
• Le Châtelier’s principle can be used to predict the effect that a stress will have on experimentally measurable properties such as pH, temperature, and color of a solution.