Question

Which of the answer choices correctly describes Le Châtlier's principle?

A. When a reaction is at chemical equilibrium, a change in the system will cause the system to shift in the direction that will balance the change and help the reaction regain chemical equilibrium.

B. When a reaction is at chemical equilibrium, a change in the system will cause the system to shift in the direction that will increase the change's effect and keep the reaction from regaining chemical equilibrium.

C. When a reaction is at chemical equilibrium, a change in the system will cause the system to become an irreversible reaction until it regains chemical equilibrium.

D. When a reaction is at chemical equilibrium, a change in the system will cause the system to become an irreversible reaction and become unable to regain chemical equilibrium.

Answer 1

Answer;

A. When a reaction is at chemical equilibrium, a change in the system will cause the system to shift in the direction that will balance the change and help the reaction regain chemical equilibrium.

Step-by-step explanation;

• Le Chatelier's principle states that when a change or a "stress" is placed on a system that is at equilibrium, the system will shift in such a way to relieve that change or stress.
• The stresses include; changing the concentration of reactants or products, altering the temperature in the system and changing the pressure of the system.
• Therefore; when a chemical reaction is at equilibrium and experiences a change in pressure, temperature, or concentration of products or reactants, the equilibrium shifts in the opposite direction to offset the change.