Equilibrium and Le Chatelier's Principle

What two factors indicate that a reaction is at equilibrium?

• Concentrations are equal; the forward and reverse reactions are equal

• The concentrations are constant; the forward and reverse reactions are equal

• The concentrations are equal; the forward reaction is faster than the reverse reaction

• The concentrations are constant; the forward reaction is faster than the reverse reaction

Which of the following statements is not correct regarding equilibrium?

• Equilibrium is achieved when the product and reactant concentrations are the same

• Equilibrium is achieved when the concentrations of all reactants is constant

• Equilibrium is achieved when the forward and reverse reactions are equal

• Equilibrium is achieved when the ratio of products to reactants is constant

Tags

NGSS.HS-PS1-6

A double sided arrow (↔), indicates that a reaction is:

• Reversible

• Irreversible

• Not reactive

Tags

NGSS.HS-PS1-6

A single sided arrow (→), indicates that a reaction is:

• Reversible

• Irreversible

• Not reactive

When the forward and reverse reactions are occurring at the same rate, the reaction is said to be at:

• Chemical equilibrium

• Chemical reaction

• Chemical constant

• Chemical peace

Tags

NGSS.HS-PS1-6

If a reversible reaction has reached equilibrium, which of the following is true about the concentration of the reactants vs the products?

• Some reactants are present, as are some prooducts

• Only reactant is present, there are no products

• Only product is present, there are no reactants

Tags

NGSS.HS-PS1-6

Which of the following is true if the value of the equilibrium constant, K, is greater than 1

• Products are favored over reactants

• Reactants are favored over products

• Reactants and products are equally favored

Tags

NGSS.HS-PS1-6

Which of the following is true if the value of the equilibrium constant, K, is less than 1

• Products are favored over reactants

• Reactants are favored over products

• Reactants and products are equally favored

Tags

NGSS.HS-PS1-6

How does a catalyst affect equilibrium?

• It makes the reaction occur faster, and makes the equilibrium shift to make more products

• It makes the reaction occur faster, but does not shift the placement of the equilibrium

• It does not change the rate of the reaction, but makes the equilibrium shift to make more products

• A catalyst has no effect on the rate of a reaction or the placement of the equilibrium

Which of the following factors has no effect on the position of the chemical equilibrium for a reaction?

• Pressure

• Temperature

• Catalyst

• Concentration

Tags

NGSS.HS-PS1-6