AP Equilibrium Review

An equilibrium constant with a large magnitude indicates…

• A very fast reaction

• Higher concentration of products at equilibrium

• Higher concentration of reactants at equilibrium

• Nothing, without considering the stoichiometry of the reaction

Tags

NGSS.HS-PS1-6

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

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

• gaseous
• liquid
• solid
• plasma

For the reaction...

SO₂ + O₂ ↔ SO₃

If the concentration of SO₂ is increased, the reaction will shift ___________.

• to the reactants

• to the products

• to reactants and products

• to neither reactants nor the products

N₂O₄(g) ↔ 2 NO₂(g)

What is the equilibrium constant expression?

• K = [NO₂]²/[N₂O₄]

• K = [N₂O₄]/[NO₂]²

• K = [N₂O₄]²/[NO₂]

• K = [NO₂]/[N₂O₄]²

2 SO₂ (g) + O₂ (g) ↔ 2 SO₃ (g)

Removing O₂ (g) will

• shift equilibrium right

• shift equilibrium left

• increase pressure

• have no change

If the equilibrium constant is much greater than one (K >> 1) then

• Equilibrium is not established.
• Equilibrium lies to the right (products are favored)
• Equilibrium lies to the left (reactants are favored)
• Neither products or reactants are favored.

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-4

If the equilibrium constant is much less than one (K << 1) then

• Equilibrium is not established.
• Equilibrium lies to the right (products are favored)
• Equilibrium lies to the left (reactants are favored)
• Neither products or reactants are favored.

What is the equilibrium expression for:

Fe₃O₄(s) + 4 H₂(g) ↔ 3 Fe(s) + 4 H₂O(g)

• K = ([Fe]³[H₂O]⁴ ) / ([Fe₃O₄][H₂]⁴)

• K = ([Fe₃O₄][H₂]⁴)/ ([Fe]³[H₂O]⁴)

• K = [H₂O]⁴ / [H₂]⁴

• K = ([Fe][H₂O]) / ([Fe₃O₄][H₂])

Tags

NGSS.HS-PS1-6

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