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

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

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

• Pressure

• Temperature

• Catalyst

• Concentration

N₂(g) + 3H₂(g) ↔ 2 NH₃(g) + heat

Increasing the temperature will cause the equilibrium to:

• Shift right

• Shift left

• Have no change

• Speed up

N₂(g) + 3H₂(g) ↔ 2 NH₃(g) + heat

Increasing the pressure will cause the equilibrium to:

• Shift right

• Shift left

• Have no change

• Speed up

Changes in pressure will only affect substances that are in the __________ state.

• gaseous
• liquid
• solid
• plasma

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

• the system will adjust to increase the stress
• the system will adjust to reduce the stress
• the system will not adjust

Tags

NGSS.HS-PS1-6

Equilibrium #1

Add a catalyst to the equilibrium

• Favor the products

• Favor the reactants

• No Effect on Equilibrium