Le Chatelier's Principle

Which of the following factors does NOT affect the position of equilibrium in a chemical reaction?

• Temperature

• Pressure

• Catalyst

• Concentration

Tags

NGSS.HS-PS1-6

If the concentration of a reactant is increased in a system at equilibrium, what will happen according to Le Chatelier's principle?

• The equilibrium will shift to the right.

• The equilibrium will shift to the left.

• The equilibrium will remain unchanged.

• The reaction will stop.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

• Shift to the right

• Shift to the left

• No change

• Reaction stops

Tags

NGSS.HS-PS1-6

Explain why increasing the temperature of an exothermic reaction shifts the equilibrium to the left.

• Because it increases the concentration of reactants.

• Because it decreases the concentration of products.

• Because it favors the endothermic reverse reaction.

• Because it increases the rate of the forward reaction.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

• The equilibrium will shift to the right.

• The equilibrium will shift to the left.

• The equilibrium will remain unchanged.

• The reaction will stop.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Tags

NGSS.HS-PS1-6

Describe how a catalyst affects the rate of a reaction and the position of equilibrium.

• Increases the rate of reaction and shifts equilibrium to the right.

• Increases the rate of reaction but does not affect the position of equilibrium.

• Decreases the rate of reaction and shifts equilibrium to the left.

• Decreases the rate of reaction but does not affect the position of equilibrium.

• The equilibrium will shift to the right.

• The equilibrium will shift to the left.

• The equilibrium will remain unchanged.

• The reaction will stop.

Tags

NGSS.HS-PS1-6

• It changes with concentration.

• It changes with temperature.

• It changes with pressure.

• It changes with the presence of a catalyst.

Tags

NGSS.HS-PS1-6

Predict the effect of decreasing temperature on the equilibrium position of an endothermic reaction.

• The equilibrium will shift to the right.

• The equilibrium will shift to the left.

• The equilibrium will remain unchanged.

• The reaction will stop.