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Worksheets

Le Chatelier

Total questions: 18

Worksheet time: 16mins

Name
Class
Date
1.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Adding SO2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase rate of reaction

d)

have no change

2.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Increasing the temperature will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

3.

2SO2(g) + O2(g) ⇌ 2SO3(g) + Heat


Removing O2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

4.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Adding SO3(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase K

d)

have no change

5.

2SO2(g)+1O2(g) ⇌ 2SO3(g) + Heat


Increasing the volume of the container will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

slow rate of reaction

d)

have no change

6.

2SO2(g)+1O2(g) ⇌ 2SO3(g) + Heat


Increasing the pressure on the system will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

slow rate of reaction

d)

have no change

7.

1N2 + 3H2 →2NH3


When the pressure on the system is increased, the equilibrium position shifts to the right. Why?

a)

To increase the amount of products

b)

To reduce the pressure, as the right side has fewer molecules of gas

c)

Keq will increase when it is shifted to the right

d)

To increase the pressure, as the right side has more molecules of gas

8.

CoCI42- +6H2O →Co(H2O)62+ + 4CI-


What will happen when CI- ions are added?

a)

Position of equilibrium will shift to left and become more pink

b)

Color of system will turn to all pink

c)

Concentration of reactants and products remain unchanged

d)

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

9.

2CrO42- + 2H+ → Cr2O72- + H2O


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

a)

Position of equilibrium will shift to left and become more yellow

b)

Color of system will turn all yellow

c)

Color of system will turn all orange

d)

Equilibrium will shift to right and become more orange

10.

Heat + 1 N2O4 → 2 NO2


What will happen when the temperature is increased?

a)

Position of equilibrium will shift to left and become lighter in color

b)

Position of equilibrium will shift to right and become more brown

c)

No change in position of equilibrium

d)

Position of equilibrium will shift to right and become lighter in color

11.

CoCI42- +6H2O →Co(H2O)62+ + 4CI- + Heat


What will happen when the temperature is increased?

a)

Position of equilibrium will shift to left and become more blue

b)

Position of equilibrium will shift to right and become more pink

c)

No change in position of equilibrium

d)

Position of equilibrium will shift to left and become more pink

12.

2CrO42- + 2H+→Cr2O72- + H2O


What will happen when OH- ions are added to the system? HINT: They remove the H+ ions.

a)

Position of equilibrium will shift to right and become more orange

b)

Position of equilibrium will shift to left and become more yellow

c)

Position of equilibrium will shift to right and become more yellow

d)

OH- ions will not react, and thus no change is seen.

13.

2SO2(g)+1O2(g) ⇌ 2SO3(g) + Heat


Increasing the volume of the container will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

slow rate of reaction

d)

have no change

14.

What happens to the equilibrium if we add methane (CH4)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

15.

What happens to the equilibrium if we add hydrogen (H2)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

16.

What happens to the equilibrium if we remove carbon monoxide (CO)?

a)

It shifts left, towards the reactants

b)

It shifts right, towards the products

c)

It does not shift

17.

What happens when sodium ions (Na+) are added?

a)

The reaction shifts left, towards the reactants

b)

The reaction shifts right, towards the products

c)

There is no shift

18.

What happens when fluoride ions (F-) are removed?

a)

The reaction shifts left, towards the reactants

b)

The reaction shifts right, towards the products

c)

There is no shift