Free Printable Equilibrium and Le Chatelier's Principle (intro level

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Equilibrium and Le Chatelier's Principle (intro level - no Keq)

Total questions: 22

Worksheet time: 17mins

Name

Class

Date

This Law "states that any change to system at equilibrium will result in an expected shift that counteracts the change"

Le Chatelier's Principle

Boyles Law

Law of thermodynamics

This symbol indicates that a reaction is ____________

reversible

irreversible

The following factors affect the position of equilibrium EXCEPT

Concentration

Pressure

Temperature

States of matter

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

gaseous

liquid

solid

plasma

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

2SO₂(g)+O₂(g) ⇌ 2SO₃(g) + Heat

Increasing the temperature will...

shift equilibrium right

shift equilibrium left

increase pressure

have no change

2SO_2(g) + O_2(g) ⇌ 2SO_3(g)+ Heat

Removing O_2(g) will

shift equilibrium right

shift equilibrium left

increase pressure

have no change

2SO₂(g)+O₂(g) ⇌ 2SO₃(g) + Heat

Adding SO₃(g) will

shift equilibrium right

shift equilibrium left

increase K

have no change

2SO₂(g)+1O₂(g) ⇌ 2SO₃(g) + Heat

Increasing the volume of the container will...

shift equilibrium right

shift equilibrium left

slow rate of reaction

have no change

10.

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

11.

2SO₂(g) + O₂(g) ⇌ 2SO₃(g) + Heat

Using a catalyst

shift equilibrium right

shift equilibrium left

increase the rate of reaction

have no change

12.

7. When heat is released, what type of reaction takes place?

Exothermic

Osmosis

Endothermic

13.

8. Heat is the reactant in the system, $\Delta$ H=+

Exothermic

Osmosis

Endothermic

14.

Which is the reactant - and why?

A, as concentration decreases

B, as concentration decreases

A, as concentration increases

B, as concentration increases

15.

At what time the reaction reached equilibrium?

t₁

t₂

t₃

t₄

16.

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)

17.

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

18.

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

19.

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

20.

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

21.

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

22.

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

100 %

Equilibrium and Le Chatelier's Principle (intro level - no Keq)

Total questions: 22

Worksheet time: 17mins

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