PAG 12.3 – Investigating the reaction between potassium manganate(VII) and ethanedioic acid

Last updated: 12/03/2020

OCR-A A-Level Chemistry Spectroscopy PAG 12.3 – Investigating the reaction between potassium manganate(VII) and ethanedioic acid

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Question 1 of 30

1. Question
How many parts are there to this experiment?
- 2
- 1
- 3
- 4
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Question 2 of 30

2. Question
What concentration of potassium manganate(VII) should be used?
- 0.02 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
- 0.5 mol dm $^{-3}$
- 1.0 mol dm $^{-3}$
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Question 3 of 30

3. Question
What concentration of ethanedioic acid should be used?
- 0.5 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
- 0.02 mol dm $^{-3}$
- 1.0 mol dm $^{-3}$
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Question 4 of 30

4. Question
What concentration of sulfuric acid should be used?
- 1.0 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
- 0.02 mol dm $^{-3}$
- 0.5 mol dm $^{-3}$
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Question 5 of 30

5. Question
What website can be used to find hazard information on the chemicals being used within this experiment?
- CLEAPSS
- Wikipedia
- Google
- BBC bitesize
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Question 6 of 30

6. Question
What type of conditions does part 1 take place in?
- Neutral
- Acidic
- Endothermic
- Exothermic
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Question 7 of 30

7. Question
What type of conditions does part 2 take place in?
- Acidic
- Neutral
- Endothermic
- Exothermic
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Question 8 of 30

8. Question
What colour forms when potassium manganate(VII) reacts with ethanedioic acid?
- Brown
- Blue
- Colourless
- Pale pink
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Question 9 of 30

9. Question
How can the initial rate be determined within part 1?
- Measure the time taken for the brown colour to form
- Measure the change in volume
- Measure the change in pH
- Measure the volume of gas released
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Question 10 of 30

10. Question
During part 1, what should the ethanedioic acid be mixed with initially?
- Water
- Ethanol
- Sulfuric acid
- Potassium manganate(VII)
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Question 11 of 30

11. Question
How many times will the experiment be repeated during part 1?
- 3
- 2
- 1
- 4
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Question 12 of 30

12. Question
What is an equation to find the initial rate?
- 1 / T
- T / 1
- T / 10
- 10 / T
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Question 13 of 30

13. Question
During part 2, what should the ethanedioic acid be mixed with initially?
- Sulfuric acid
- Ethanol
- Water
- Potassium manganate(VII)
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Question 14 of 30

14. Question
What acid should be used during part 2?
- Sulfuric acid
- Phosphoric acid
- Hydrochloric acid
- Nitric acid
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Question 15 of 30

15. Question
How many times will the experiment be repeated during part 2?
- 3
- 4
- 2
- 1
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Question 16 of 30

16. Question
What type of potassium manganate(VII) should be used?
- Aqueous
- Gaseous
- Solid
- Liquid
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Question 17 of 30

17. Question
What type of ethanedioic acid should be used?
- Aqueous
- Gaseous
- Solid
- Liquid
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Question 18 of 30

18. Question
What type of sulfuric acid should be used?
- Aqueous
- Gaseous
- Solid
- Liquid
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Question 19 of 30

19. Question
When potassium manganate(VII) and ethanedioic acid are reacted together in neutral conditions, which of the following gases are formed?
- Carbon dioxide
- Nitrogen dioxide
- Hydrogen
- Oxygen
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Question 20 of 30

20. Question
When potassium manganate(VII) and ethanedioic acid are reacted together in neutral conditions, which of the following products are formed?
- Water
- Potassium iodide
- Ethanol
- Hydrochloric acid
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Question 21 of 30

21. Question
When potassium manganate(VII) and ethanedioic acid are reacted together in neutral conditions, which of the following products are formed?
- Manganese dioxide
- Potassium oxide
- Manganese manganate
- Manganese chloride
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Question 22 of 30

22. Question
What state is manganese dioxide in?
- Solid
- Liquid
- Aqueous
- Gaseous
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Question 23 of 30

23. Question
Write the equation for the reaction between potassium manganate(VII) and ethanedioic acid in neutral conditions.
- $2MnO_4^-(aq) + 3H_2C_2O_4^{2-}(aq) -> 2MnO_2(s) + 2H_2O(l) + 6CO_2(aq) + 2OH^-(aq)$
- $MnO_4^-(aq) + 3H_2C_2O_4^-(aq) -> 2MnO_2(s) + 2H_2O(l) + 6CO_2(aq) + 2OH(aq)$
- $2MnO_4^-(aq) + H_2C_2O_4^-(aq) -> 2MnO_2(s) + 2H_2O(l) + 6CO_2(aq) + OH^-(aq)$
- $2MnO_4^-(aq) + 3H_2C_2O_4^{2-}(aq) -> 2MnO_2(s) + 2H_2O(l) + 6CO_2(aq)$
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Question 24 of 30

24. Question
When potassium manganate(VII) and ethanedioic acid are reacted together in acidic conditions, what gas is formed?
- Carbon dioxide
- Carbon monoxide
- Oxygen
- Nitrogen dioxide
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Question 25 of 30

25. Question
When potassium manganate(VII) and ethanedioic acid are reacted together in acidic conditions, which of the following products are formed?
- Water
- Hydrochloric acid
- Ethanol
- Potassium iodide
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Question 26 of 30

26. Question
When potassium manganate(VII) and ethanedioic acid are reacted together in acidic conditions, what is the charge of Mn?
- +2
- +3
- +1
- +4
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Question 27 of 30

27. Question
What is the charge of MnO $_4$ ?
- -1
- -2
- -3
- -4
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Question 28 of 30

28. Question
What ion is reacted when potassium manganate(VII) and ethanedioic acid are reacted together in acidic conditions?
- H $^+$
- H $^-$
- OH $^+$
- OH $^-$
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Question 29 of 30

29. Question
Write the equation for the reaction between potassium manganate(VII) and ethanedioic acid in acidic conditions.
- $2MnO_4^-(aq) + 5H_2C_2O_4^{2-}(aq) + 6H^+(aq) -> 2Mn^{2+}(aq) + 8H_2O(l) + 10CO_2(aq)$
- $MnO_4^-(aq) + 5H_2C_2O_4^-(aq) + 6H^+(aq) -> Mn^{2+}(aq) + 8H_2O(l) + 10CO_2(aq)$
- $2MnO_4^-(aq) + 5H_2C_2O_4^{2-}(aq) + 6H^+(aq) -> 2Mn^{2+}(aq) + 8H_2O(l)$
- $2MnO_4^-(aq) + 5H_2C_2O_4^{2-}(aq) + 6H(aq) -> 2Mn^{2+}(aq) + 10CO_2(aq)$
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Question 30 of 30

30. Question
What is the definition of an auto catalyst?
- When a reaction is catalysed by one of its own products
- When a reaction only starts using an acid catalyst
- When a reaction does not require a catalyst
- When a reaction is catalysed by one of its own reactants
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