Understanding Equilibrium and Le Chatelier's Principle

The video explains the application of Le Chatelier's principle to chemical reactions at equilibrium. It discusses how changes in concentration, volume, and pressure affect the equilibrium state. The video also covers the effects of adding inert gases, solids, and catalysts, emphasizing that these do not shift the equilibrium. Key concepts include equilibrium constants, partial pressures, and the role of activation energy in reaction rates.

What is the state of a reaction when the rates of the forward and reverse reactions are equal?

• Dynamic equilibrium

• Kinetic equilibrium

• Static equilibrium

• Thermal equilibrium

According to Le Chatelier's Principle, what happens when CO2 is added to a system at equilibrium?

• The reaction shifts to favor the products

• The reaction shifts to favor the reactants

• The reaction rate decreases

• The reaction rate increases

How is the equilibrium constant expressed in terms of concentration?

• Ka

• Kc

• Kp

• Kb

What effect does increasing the volume of the container have on the equilibrium of a gaseous reaction?

• Decreases the partial pressure of gases

• Decreases the concentration of products

• Increases the partial pressure of gases

• Increases the concentration of reactants

What is the effect of adding an inert gas like Argon to a reaction at equilibrium?

• No change in equilibrium

• Increases the partial pressure of reactants

• Shifts the equilibrium towards reactants

• Shifts the equilibrium towards products

Why does adding more calcium carbonate not affect the equilibrium of the reaction?

• It is a catalyst

• It is a solid

• It is a gas

• It is a liquid

What is the primary role of a catalyst in a chemical reaction?

• To increase the activation energy

• To increase the temperature

• To lower the activation energy

• To decrease the temperature

How does a catalyst affect the rates of the forward and reverse reactions?

• Speeds up only the reverse reaction

• Slows down both forward and reverse reactions

• Speeds up only the forward reaction

• Speeds up both forward and reverse reactions

Which of the following does not shift the equilibrium of a reaction?

• Changing the concentration of reactants

• Changing the pressure

• Changing the temperature

• Adding a catalyst

What happens to the equilibrium when a catalyst is added to a reaction?

• Equilibrium shifts towards products

• Equilibrium shifts towards reactants

• No shift in equilibrium

• Equilibrium is destroyed