GCSE Chemistry – Le Chatelier’s Principle and optimum conditions

Last updated: 07/07/2020

CCEA GCSE Science – Chemistry higher Equilibrium GCSE Chemistry – Le Chatelier’s Principle and optimum conditions

Learning Objectives

-I can state Le Chatalier’s principle
-I can use Le Chatalier’s principle to predict optimum reaction conditions

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Question 1 of 40

1. Question
What is the definition of a reversible reaction?
- When the products in a reaction are able to react together to form the original reactants
- When the products in a reaction are not able to react together to form the original reactants
- When the products in a reaction are able to react together to form the new reactants
- When the products in a reaction are not able to react together to form the new reactants
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Question 2 of 40

2. Question
What is the definition of an open system?
- A reaction where reactants or products can get in or out
- A reaction where no reactants or products can get in or out
- A reaction where no particles can get in or out
- A reaction where particles can get in or out
Correct

Incorrect
Question 3 of 40

3. Question
What is the definition of a closed system?
- A reaction where no reactants or products can get in or out
- A reaction where reactants or products can get in or out
- A reaction where no particles can get in or out
- A reaction where particles can get in or out
Correct

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Question 4 of 40

4. Question
What is needed for a reaction to be at equilibrium?
- Reversible reaction
- Irreversible reaction
- Different concentrations of reactants and products
- Different masses of reactants and products
Correct

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Question 5 of 40

5. Question
What is needed for a reaction to be at equilibrium?
- Closed system
- Open system
- No system
- Same system
Correct

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Question 6 of 40

6. Question
What does the rate of the forward reaction equal when a reaction is at equilibrium?
- Rate of the reverse reaction
- Mass of the reverse reaction
- Concentration of the reverse reaction
- Nothing
Correct

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Question 7 of 40

7. Question
What does the rate of the reverse reaction equal when a reaction is at equilibrium?
- Rate of the forward reaction
- Mass of the forward reaction
- Concentration of the forward reaction
- Nothing
Correct

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Question 8 of 40

8. Question
Why will the position of equilibrium shift when the conditions of a reaction are changed?
- To cancel out and minimise any changes
- To stop any reactants getting used up
- To make the experiment more expensive to run
- To make the experiment cheaper to run
Correct

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Question 9 of 40

9. Question
If the temperature of a reaction is increased, how does the equilibrium shift?
- To reduce the temperature
- To increase the temperature
- To stop the temperature
- Equilibrium will not do anything
Correct

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Question 10 of 40

10. Question
If the temperature of a reaction is decreased, how does the equilibrium shift?
- To increase the temperature
- To reduce the temperature
- To stop the temperature
- Equilibrium will not do anything
Correct

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Question 11 of 40

11. Question
The temperature of a reaction that is exothermic has been increased, what happens to the amount of the products formed within this reaction?
- Amount of products formed decreases
- Amount of products formed increases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 12 of 40

12. Question
The temperature of a reaction that is exothermic has been decreased, what happens to the amount of the products formed within this reaction?
- Amount of products formed increases
- Amount of products formed decreases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 13 of 40

13. Question
Which way will the position of equilibrium favour when the temperature of an exothermic reaction is increased?
- Reactants
- Products
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 14 of 40

14. Question
Which way will the position of equilibrium favour when the temperature of an exothermic reaction is increased?
- Right hand side
- Left hand side
- Middle
- No specific direction
Correct

Incorrect
Question 15 of 40

15. Question
Which way will the position of equilibrium favour when the temperature of an exothermic reaction is decreased?
- Products
- Reactants
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 16 of 40

16. Question
Which way will the position of equilibrium favour when the temperature of an exothermic reaction is decreased?
- Left hand side
- Right hand side
- Middle
- No specific direction
Correct

Incorrect
Question 17 of 40

17. Question
The temperature of a reaction that is endothermic has been increased, what happens to the amount of the products formed within this reaction?
- Amount of products formed increases
- Amount of products formed decreases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 18 of 40

18. Question
The temperature of a reaction that is endothermic has been decreased, what happens to the amount of the products formed within this reaction?
- Amount of products formed decreases
- Amount of products formed increases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 19 of 40

19. Question
Which way will the position of equilibrium favour when the temperature of an endothermic reaction is increased?
- Right hand side
- Left hand side
- Middle
- No specific direction
Correct

Incorrect
Question 20 of 40

20. Question
Which way will the position of equilibrium favour when the temperature of an endothermic reaction is increased?
- Products
- Reactants
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 21 of 40

21. Question
Which way will the position of equilibrium favour when the temperature of an endothermic reaction is decreased?
- Reactants
- Products
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 22 of 40

22. Question
Which way will the position of equilibrium favour when the temperature of an endothermic reaction is decreased?
- Left hand side
- Right hand side
- Middle
- No specific direction
Correct

Incorrect
Question 23 of 40

23. Question
What will happen to the amount of product formed when the concentration of the reactants of a reaction is increased?
- Amount of products formed increases
- Amount of products formed decreases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 24 of 40

24. Question
What will happen to the amount of product formed when the concentration of the reactants of a reaction is decreased?
- Amount of products formed decreases
- Amount of products formed increases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 25 of 40

25. Question
Which way will the position of equilibrium favour when the concentration of the reactants in a reaction is increased?
- Products
- Reactants
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 26 of 40

26. Question
Which way will the position of equilibrium favour when the concentration of the reactants in a reaction is decreased?
- Reactants
- Products
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 27 of 40

27. Question
Which way will the position of equilibrium favour when the concentration of the reactants in a reaction is increased?
- Right hand side
- Left hand side
- Middle
- No specific direction
Correct

Incorrect
Question 28 of 40

28. Question
Which way will the position of equilibrium favour when the concentration of the reactants in a reaction is decreased?
- Left hand side
- Right hand side
- Middle
- No specific direction
Correct

Incorrect
Question 29 of 40

29. Question
If the forward reaction produces more molecules of gas, what will happen to the amount of products formed when the pressure of the reaction is increased?
- Amount of products formed decreases
- Amount of products formed increases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 30 of 40

30. Question
If the forward reaction produces fewer molecules of gas, what will happen to the amount of products formed when the pressure of the reaction is decreased?
- Amount of products formed decreases
- Amount of products formed increases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 31 of 40

31. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces fewer molecules of gas is increased?
- Products
- Reactants
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 32 of 40

32. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces fewer molecules of gas is decreased?
- Reactants
- Products
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 33 of 40

33. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces fewer molecules of gas is increased?
- Right hand side
- Left hand side
- Middle
- No specific direction
Correct

Incorrect
Question 34 of 40

34. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces fewer molecules of gas is decreased?
- Left hand side
- Right hand side
- Middle
- No specific direction
Correct

Incorrect
Question 35 of 40

35. Question
If the forward reaction produces more molecules of gas, what will happen to the amount of products formed when the pressure of the reaction is decreased?
- Amount of products formed increases
- Amount of products formed decreases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 36 of 40

36. Question
If the forward reaction produces fewer molecules of gas, what will happen to the amount of products formed when the pressure of the reaction is increased?
- Amount of products formed increases
- Amount of products formed decreases
- Not effect on the amount of products formed
- No products are formed
Correct

Incorrect
Question 37 of 40

37. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces more molecules of gas is increased?
- Reactants
- Products
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 38 of 40

38. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces more molecules of gas is decreased?
- Products
- Reactants
- Both reactants and products
- Neither reactants or products
Correct

Incorrect
Question 39 of 40

39. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces more molecules of gas is increased?
- Left hand side
- Right hand side
- Middle
- No specific direction
Correct

Incorrect
Question 40 of 40

40. Question
Which way will the position of equilibrium favour when the pressure of a reaction where the forward reaction produces more molecules of gas is decreased?
- Right hand side
- Left hand side
- Middle
- No specific direction
Correct

Incorrect