Reversible Reactions and Equilibrium

What does a double arrow in the middle of a chemical reaction indicate?

• The reaction is irreversible

• The reaction is exothermic

• The reaction is endothermic

• The reaction is reversible

Tags

NGSS.HS-PS1-6

What is the term used to describe the point where the forward and backward reactions in a reversible reaction occur at the same rate?

• Catalysis

• Equilibrium

• Activation energy

• Inhibition

Tags

NGSS.HS-PS1-6

In a reversible reaction, which direction will the equilibrium shift if more products are formed?

• To the right

• It will stop reacting

• To the left

• It will not shift

Tags

NGSS.HS-PS1-6

What is the term used to describe a substance with water present?

• Anhydrous

• Aqueous

• Dehydrated

• Hydrated

In the thermal decomposition of hydrated copper sulfate, which direction is the forward reaction?

• It depends on the temperature

• Exothermic

• It does not have a direction

• Endothermic

Tags

NGSS.HS-PS1-4

What type of system is required for a reversible reaction to reach equilibrium?

• Open system

• Closed system

• Isolated system

• Dynamic system

Tags

NGSS.HS-PS1-6

What happens to the concentrations of the reactants and products at equilibrium?

• They increase

• They decrease

• They remain constant

• They become zero

Tags

NGSS.HS-PS1-6

What effect does adding heat to a reversible reaction have on the position of equilibrium?

• It shifts to the left

• It shifts to the right

• It has no effect

• It stops the reaction

In a reversible reaction, what happens if the forward and backward rates are not the same?

• The reaction becomes exothermic

• The reaction becomes irreversible

• The reaction reaches equilibrium

• The reaction stops

Tags

NGSS.HS-PS1-5

What is the term used to describe the position of equilibrium when there are more reactants than products?

• Dynamic equilibrium

• Static equilibrium

• Equilibrium lies to the left

• Equilibrium lies to the right