chemical Equilibrium

What is the K_eq expression for this reaction?

2 NO_(g) + O_2(g) ⇌ 2 NO_2(g)

• K_eq = [NO₂]² / [NO]² [O₂]

• K_eq = [NO]² [O₂] / [NO₂]²

• K_eq = [NO]² [O₂] [NO₂]²

• K_eq = [NO₂]² / [NO]² + [O₂]

What is the equilibrium expression for this reaction?

Fe₃O₄(s) + 4H₂(g) <=> 3Fe(s) + 4H₂O(g)

• [Fe]³ [H₂O]⁴ / [Fe₃O₄] [H₂]⁴

• [Fe₃O₄] [H₂]⁴ / [Fe]³ [H₂O]⁴

• [H₂O]⁴ / [H₂]⁴

• [Fe] [H₂O] / [Fe₃O₄] [H₂]

Tags

NGSS.HS-PS1-6

When K is very large,

• There are more products than reactants when the reaction reached equilibrium.

• There are more reactants than products when the reaction reached equilibrium.

• The amount of reactants is equal to the amount of products.

Tags

NGSS.HS-PS1-6

Consider the following reaction at equilibrium:

SO_{2 (g)} + NO_{2 (g)} ↔ SO_{3 (g)} + NO (g)

The concentrations of reactants and products are found to be 0.40 M SO₃ , 0.30 M NO, 0.15 M NO₂ , and 0.20 M SO₂. Calculate the equilibrium constant for this reaction.

• 4

• .42

• .25

• 1

At 298 Kelvin, the K_eq for the following reaction is 4.3 x 10^-4 , [NO₂^-] = 0.043 M, and [H₃O⁺] = 0.043 M

HNO₂(aq) + H₂O(l) ↔ H₃O⁺(aq) + NO₂^-(aq)

Calculate the concentration of HNO₂

• 0.23 M

• 4.3 M

• 100 M

• 0.01 M

2SO₂(g)+O₂(g)⇌2SO₃(g)
Removing O₂(g) will

• shift equilibrium right
• shift equilibrium left
• decrease temperature
• have no change

2SO₂(g)+O₂(g)⇌2SO₃(g)

Increasing the volume of container will

• shift equilibrium right

• shift equilibrium left

• change K

• have no change

H₂(g)+Cl₂(g)⇌2HCl(g)

Increasing the pressure will

• shift equilibrium right

• shift equilibrium left

• You cannot predict the effect

• have no change

H₂(g)+Cl₂(g)⇌2HCl(g) + Heat

What will happen to the equilibrium if the temperature is increased?

• equilibrium shifts right

• equilibrium shifts left

• You cannot predict the effect

• no change

Tags

NGSS.HS-PS1-5

For the reaction...

heat + N₂ + O₂ <−> 2NO

If the temperature is decreased, the concentration of N₂ will _______.

• increase

• decrease

• remain the same

• double

Tags

NGSS.HS-PS1-5