PAG 8.3 – Electrochemical cells 3 – Primrose Kitten

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PAG 8.3 – Electrochemical cells 3

Last updated: 12/03/2020

OCR-A A-Level Chemistry Redox and electrode potentials PAG 8.3 – Electrochemical cells 3

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Question 1 of 38

1. Question
What is the definition of an electrochemical cell?
- A device that generates a potential difference between electrodes
- An electrochemical cell
- A device that measures the voltage of a cell
- A cell that consists of two different types of metals
Correct

Incorrect
Question 2 of 38

2. Question
What is the standard electrode potential for the iron half cell?
- -0.44 V
- -0.76 V
- +0.34 V
- -2.37 V
Correct

Incorrect
Question 3 of 38

3. Question
What is the standard cell potential for the magnesium/zinc half cell?
- 1.61 V
- 0.32 V
- 2.71 V
- 1.93 V
Correct

Incorrect
Question 4 of 38

4. Question
What sized piece of iron should be used?
- 1 cm $^2$
- 2 cm $^2$
- 3 cm $^2$
- 4 cm $^2$
Correct

Incorrect
Question 5 of 38

5. Question
What is the standard electrode potential for the copper half cell?
- +0.34 V
- -0.76 V
- -0.44 V
- -2.37 V
Correct

Incorrect
Question 6 of 38

6. Question
What sized piece of zinc should be used?
- 1 cm $^2$
- 2 cm $^2$
- 3 cm $^2$
- 4 cm $^2$
Correct

Incorrect
Question 7 of 38

7. Question
What is the standard cell potential for the magnesium/iron half cell?
- 1.93 V
- 0.32 V
- 2.71 V
- 1.61 V
Correct

Incorrect
Question 8 of 38

8. Question
Where should the zinc sulfate(VI) be placed?
- On one end of the filter paper
- In a beaker
- On one end of the emery paper
- In a measuring cylinder
Correct

Incorrect
Question 9 of 38

9. Question
What are the units for potential difference?
- V
- Hz
- J
- Pa
Correct

Incorrect
Question 10 of 38

10. Question
What is the standard cell potential for the magnesium/copper half cell?
- 2.71 V
- 0.32 V
- 1.93 V
- 1.61 V
Correct

Incorrect
Question 11 of 38

11. Question
What should be added to the centre of the filter paper?
- Potassium nitrate(V)
- Copper sulfate(VI)
- Copper nitrate(V)
- Zinc sulfate(VI)
Correct

Incorrect
Question 12 of 38

12. Question
What does a voltmeter measure?
- Potential difference
- Electricity
- Mass of a compound
- Power of a compound
Correct

Incorrect
Question 13 of 38

13. Question
What is the standard cell potential for the zinc/iron half cell?
- 0.32 V
- 2.71 V
- 1.93 V
- 1.61 V
Correct

Incorrect
Question 14 of 38

14. Question
How much copper sulfate(VI) should be used?
- 3-4 drops
- 2-3 drops
- 4-5 drops
- 1-2 drops
Correct

Incorrect
Question 15 of 38

15. Question
What units is voltage measured in?
- Volts
- Hertz
- Meters
- Joules
Correct

Incorrect
Question 16 of 38

16. Question
What is the standard cell potential for the zinc/copper half cell?
- 1.10 V
- 2.71 V
- 0.78 V
- 1.61 V
Correct

Incorrect
Question 17 of 38

17. Question
How much zinc sulfate(VI) should be used?
- 3-4 drops
- 2-3 drops
- 4-5 drops
- 1-2 drops
Correct

Incorrect
Question 18 of 38

18. Question
What is the standard cell potential for the iron/copper half cell?
- 0.78 V
- 2.71 V
- 1.10 V
- 1.61 V
Correct

Incorrect
Question 19 of 38

19. Question
Where should the copper sulfate(VI) be placed?
- On one end of the filter paper
- In a beaker
- On one end of the emery paper
- In a measuring cylinder
Correct

Incorrect
Question 20 of 38

20. Question
What is the overall equation for the magnesium/copper half cell?
- $Mg(s) + Cu^{2+}(aq) -> Cu(s) + Mg^{2+}(aq)$
- $Mg^+(aq) + Cu(s) -> Cu^+(aq) + Mg(s)$
- $Mg(s) + Cu^+(aq) -> Cu(s) + Mg^+(aq)$
- $Mg^{2+}(aq) + Cu(s) -> Cu^{2+}(aq) + Mg(s)$
Correct

Incorrect
Question 21 of 38

21. Question
What concentration of copper sulfate(VI) is used?
- 0.10 mol dm $^{-3}$
- 0.50 mol dm $^{-3}$
- 0.05 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
Correct

Incorrect
Question 22 of 38

22. Question
What is the overall equation for the zinc/copper half cell?
- $Zn(s) + Cu^{2+}(aq) -> Cu(s) + Zn^{2+}(aq)$
- $Zn^+(aq) + Cu(s) -> Cu^+(aq) + Zn(s)$
- $Zn(s) + Cu^+(aq) -> Cu(s) + Zn^+(aq)$
- $Zn^{2+}(aq) + Cu(s) -> Cu^{2+}(aq) + Zn(s)$
Correct

Incorrect
Question 23 of 38

23. Question
What concentration of iron sulfate(VI) is used?
- 0.10 mol dm $^{-3}$
- 0.50 mol dm $^{-3}$
- 0.05 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
Correct

Incorrect
Question 24 of 38

24. Question
What is the overall equation for the iron/copper half cell?
- $Fe(s) + Cu^{2+}(aq) -> Cu(s) + Fe^{2+}(aq)$
- $Fe^+(aq) + Cu(s) -> Cu^+(aq) + Fe(s)$
- $Fe(s) + Cu^+(aq) -> Cu(s) + Fe^+(aq)$
- $Fe^{2+}(aq) + Cu(s) -> Cu^{2+}(aq) + Fe(s)$
Correct

Incorrect
Question 25 of 38

25. Question
What concentration of zinc sulfate(VI) is used?
- 0.10 mol dm $^{-3}$
- 0.50 mol dm $^{-3}$
- 0.05 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
Correct

Incorrect
Question 26 of 38

26. Question
What is the overall equation for the magnesium/iron half cell?
- $Mg(s) + Fe^{2+}(aq) -> Fe(s) + Mg^{2+}(aq)$
- $Mg^+(aq) + Fe(s) -> Fe^+(aq) + Mg(s)$
- $Mg(s) + Fe^+(aq) -> Fe(s) + Mg^+(aq)$
- $Mg^{2+}(aq) + Fe(s) -> Fe^{2+}(aq) + Mg(s)$
Correct

Incorrect
Question 27 of 38

27. Question
What concentration of magnesium sulfate(VI) is used?
- 1.0 mol dm $^{-3}$
- 2.0 mol dm $^{-3}$
- 3.0 mol dm $^{-3}$
- 4.0 mol dm $^{-3}$
Correct

Incorrect
Question 28 of 38

28. Question
What is the overall equation for the zinc/iron half cell?
- $Zn(s) + Fe^{2+}(aq) -> Fe(s) + Zn^{2+}(aq)$
- $Zn^+(aq) + Fe(s) -> Fe^+(aq) + Zn(s)$
- $Zn(s) + Fe^+(aq) -> Fe(s) + Zn^+(aq)$
- $Zn^{2+}(aq) + Fe(s) -> Fe^{2+}(aq) + Zn(s)$
Correct

Incorrect
Question 29 of 38

29. Question
What is one hazard when using zinc sulfate(VI) within an experiment?
- It can cause eye irritation
- It is carcinogenic
- It is highly toxic
- It is highly flammable
Correct

Incorrect
Question 30 of 38

30. Question
What is the overall equation for the magnesium/zinc half-cell?
- $Mg(s) + Zn^{2+}(aq) -> Zn(s) + Mg^{2+}(aq)$
- $Mg^+(aq) + Zn(s) -> Zn^+(aq) + Mg(s)$
- $Mg(s) + Zn^+(aq) -> Zn(s) + Mg^+(aq)$
- $Mg^{2+}(aq) + Zn(s) -> Zn^{2+}(aq) + Mg(s)$
Correct

Incorrect
Question 31 of 38

31. Question
What piece of safety equipment must be worn?
- Goggles
- Lab coat
- Gloves
- Face mask
Correct

Incorrect
Question 32 of 38

32. Question
What should the filter paper be kept on?
- Petri dish
- Plain paper
- Water
- Beaker
Correct

Incorrect
Question 33 of 38

33. Question
What sized petri dish should be used?
- 10 cm
- 2 cm
- 5 cm
- 12 cm
Correct

Incorrect
Question 34 of 38

34. Question
What is the standard electrode potential for the magnesium half cell?
- -2.37 V
- -0.44 V
- +0.34 V
- -0.76 V
Correct

Incorrect
Question 35 of 38

35. Question
What type of pipette should be used?
- Dropping pipette
- Transfer pipette
- Graduated pipette
- Volumetric pipette
Correct

Incorrect
Question 36 of 38

36. Question
Which of the following is a property of a salt bridge?
- Inert
- Very reactive
- Conducts electricity
- Very dense
Correct

Incorrect
Question 37 of 38

37. Question
What is the standard electrode potential for the zinc half cell?
- -0.76 V
- -0.44 V
- +0.34 V
- -2.37 V
Correct

Incorrect
Question 38 of 38

38. Question
What sized piece of copper should be used?
- 1 cm $^2$
- 2 cm $^2$
- 3 cm $^2$
- 4 cm $^2$
Correct

Incorrect

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