Free Printable Le Chatelier Review

Worksheets

Le Chatelier Review

Total questions: 16

Worksheet time: 32mins

Name

Class

Date

This symbol indicates that a reaction is ____________

reversible

irreversible

Which is the reactant - and why?

A, as concentration decreases

B, as concentration decreases

A, as concentration increases

B, as concentration increases

At what time the reaction reached equilibrium?

t₁

t₂

t₃

t₄

For the reaction...
SO₂ + O₂ <=> SO₃
If the concentration of SO₂is increased, the equilibrium position of the reaction will shift ___________.

to the left

to the right

to the left and right

neither left nor right

For the reaction...
N_{2 (g)}+ 3 H₂ _(g) <=> 2 NH_{3 (g)}
If the pressure in the system is increased, which substance(s) will increase in concentration?

N₂ (as 2 mol gas → 4 mol gas)

H₂ (as 2 mol gas → 4 mol gas)

N₂ and H₂(as 2 mol gas → 4 mol gas)

NH₃ (as 4 mol gas → 2 mol gas)

For the reaction...
N₂ + O₂ <=> 2NO: Δ H = +182 kJ mol^-1.
If the temperature is increased the equilibrium position will shift _______.

to the left

to the right

to the left and right

neither left nor right

What is the K_c expression for this reaction?
2 NO_(g) + O_2(g) ⇌ 2 NO_2(g)

K_c= [NO₂]² / [NO]²[O₂]

K_c= [NO]²[O₂] / [NO₂]²

K_c= [NO]²[O₂] [NO₂]²

K_c= [NO₂]² / [NO]² + [O₂]

Consider the following reaction:
2SO_2(g)+ O_2(g)<=> 2SO_3(g): ΔΗ = -197 kJ mol ^-1
Which of the following will NOT shift the equilibrium position to the right?

Adding more O₂

Adding a catalyst

increasing the pressure

Lowering the temperature

For the reaction...
H_{2 (g)} + Cl_{2 (g)}<=> 2HCl _(g) + heat
If the pressure in the system is increased, the equilibrium position will _______.

shift to the left

shift to the right

not shift position at all as 2 mol gas <=> 2 mol gas

10.

2SO_2(g)+O_2(g)⇌ 2SO_3(g) + Heat

Adding SO_2(g)will

shift equilibrium right

shift equilibrium left

increase rate of reaction

have no change

11.

2SO₂(g)+O₂(g) ⇌ 2SO₃(g) + Heat

Increasing the temperature will...

shift equilibrium right

shift equilibrium left

increase pressure

have no change

12.

2SO₂(g)+O₂(g) ⇌ 2SO₃(g) + Heat

Adding SO₃(g) will

shift equilibrium right

shift equilibrium left

increase K

have no change

13.

2SO₂(g)+1O₂(g) ⇌ 2SO₃(g) + Heat

Increasing the pressure on the system will...

shift equilibrium right

shift equilibrium left

slow rate of reaction

have no change

14.

CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-.

What would happen when H₂O is added?

Position of equilibrium will shift to left (and become more blue)

Position of equilibrium will shift to right (and become more pink)

K_eq will increase as H₂O is added

Position of equilibrium will shift to left to reduce the added H₂O

15.

CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-

What will happen when CI^- ions are added?

Position of equilibrium will shift to left and become more pink

Color of system will turn to all pink

Concentration of reactants and products remain unchanged

Position of equilibrium will shift to left to reduce the added CI^- ions

16.

2CrO₄^2- + 2H⁺ → Cr₂O₇^2- + H₂O

What will happen when H⁺ ions are added to the system?

Position of equilibrium will shift to left and become more yellow

Color of system will turn all yellow

Color of system will turn all orange

Equilibrium will shift to right and become more orange

Reset

Le Chatelier Review

Total questions: 16

Worksheet time: 32mins

Similar Resources on Wayground