LeChatelier's Principle

Which of the following is an example of a change that does NOT affect the equilibrium position?

• adding a reactant

• removing a product

• adding a catalyst

• adding more of a solid reactant

• increasing the temperature

Tags

NGSS.HS-PS1-6

Increasing the concentration of the reactants will ___.

• shift the reaction to the left, making more reactants

• shift the equilibrium to the right, making more products

• have no effect on the equilibrium position

• decrease the value of the equilibrium constant

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

If the volume of the container is decreased at constant temperature, this will ____.

2NO_{2 (g)} ⇌ N₂O_{4 (g)}

• cause a shift to the left

• cause a shift to the right

• have no effect on the equilibrium position

• change the value of the equilibrium constant

For the reaction...

SO₂ + O₂ ⇌ SO₃

If the concentration of SO₂ is increased, the system will ___

• shift left

• shift right

• be unaffected

Tags

NGSS.HS-PS1-5

For the reaction...

heat + N₂ + O₂ ⇌ 2NO

If O₂ is removed, the concentration of N₂ will _______.

• increase

• decrease

• remain the same

• double

Tags

NGSS.HS-PS1-5

For the reaction...

heat + N₂ + O₂ ⇌ 2NO

If NO is removed from the system, the concentration of N₂ will _______.

• increase

• decrease

• remain the same

• double

Tags

NGSS.HS-PS1-5

For the reaction...

H_{2 (g)} + Cl_{2 (g)} ⇌ 2HCl _(g) + heat

If the pressure in the system is increased, the system will _______.

• shift left

• shift right

• not shift

What is LeChatelier's Principle?

• Stresses do not shift a reaction
• Equilibrium does not exist
• A stress only shifts a reaction to the right
• A reaction at equilibrium will shift to relieve a stress

For the reaction...

N_{2 (g)} + 3 H_2(g) ⇌ 2 NH_{3 (g)}

If the pressure in the system is decreased, which substance will increase in concentration?

• N₂

• H₂

• N₂ and H₂

• NH₃

• There will be no changes in concentration

For the reaction at equilibrium:

4H₂(g) + CS₂(g) ⇌ CH₄(g) + 2H₂S(g)

If some CH₄ is removed, what will happen to the concentration of H₂S in order to re-establish equilibrium?

• The H₂S concentration will increase

• The H₂S concentration will decrease

• There will be no change to the H₂S concentration.

Tags

NGSS.HS-PS1-6