GCSE Chemistry – Required practical 6 – Chromatography

Last updated: 30/05/2020

AQA GCSE Science – Chemistry foundation Chemical analysis GCSE Chemistry – Required practical 6 – Chromatography

Learning Objectives

-I can describe how chromatography can be used to identify if a compound is pure or a mixture
-I can calculate Rf values

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Question 1 of 25

1. Question
What is the definition of chromatography?
- Separating and identifying different components within a mixture
- Separating and identifying different components within a metal
- Separating and identifying different components within an atom
- Separating and identifying different components within an element
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Question 2 of 25

2. Question
What can chromatography be used for?
- Identifying mixtures of amino acids
- Identifying elements
- Identifying atoms
- Identifying mixtures of atoms
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Question 3 of 25

3. Question
What can chromatography be used for?
- Identifying if a compound is pure or a mixture
- Identifying if a compound is an atom or element
- Identifying if a compound is a metal or element
- Identifying if a compound is an element or compound
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Question 4 of 25

4. Question
What is the definition of the origin line?
- A line drawn at the bottom of the paper where the substances are added
- A line drawn to show the end of the solvent movement
- A line drawn at the top of the paper where the substances are added
- A line drawn to show the start of the solvent movement
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Question 5 of 25

5. Question
What is the definition of the solvent line?
- A line drawn to show the end of the solvent movement
- A line drawn at the bottom of the paper where the substances are added
- A line drawn at the top of the paper where the substances are added
- A line drawn to show the start of the solvent movement
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Question 6 of 25

6. Question
What is the definition of the mobile phase?
- Moves through the stationary phase, carrying the components within a mixture
- Moves through the stationary phase, carrying the components within an atom
- Moves through the stationary phase, carrying the components within an element
- Carries atoms
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Question 7 of 25

7. Question
What is the definition of the stationary phase?
- What the components in a mixture move through
- What the mixture moves through
- What the atoms in a mixture move through
- What the atoms in an element move through
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Question 8 of 25

8. Question
Within paper chromatography, what is the mobile phase?
- Solvent
- Water
- Paper
- Pencil
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Question 9 of 25

9. Question
Within paper chromatography, what is the stationary phase?
- Paper
- Water
- Solvent
- Pencil
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Question 10 of 25

10. Question
How many substances are being tested?
- 5
- 4
- 3
- 1
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Question 11 of 25

11. Question
What solvent should be used?
- Water
- Hydrochloric acid
- Sodium hydroxide
- Ammonia
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Question 12 of 25

12. Question
Where should the solvent be held?
- Beaker
- Fume cupboard
- Flask
- Test tube
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Question 13 of 25

13. Question
What is used to draw a line during paper chromatography?
- Pencil
- Pen
- Chalk
- Ink
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Question 14 of 25

14. Question
What should be used to transfer the substances onto the paper during chromatography?
- Capillary tube
- Pipette
- Spatula
- Spoon
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Question 15 of 25

15. Question
Where should your pencil line be drawn?
- 2 cm from the bottom of the paper
- 1 cm from the bottom of the paper
- 10 cm from the bottom of the paper
- 5 cm from the bottom of the paper
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Question 16 of 25

16. Question
By the end of the chromatography, how many pencil lines should be drawn on the paper?
- 2
- 1
- 3
- 4
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Question 17 of 25

17. Question
What should the paper be left in?
- Water
- Hydrochloric acid
- Sodium hydroxide
- Ammonia
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Question 18 of 25

18. Question
How deep should the paper be left in the water?
- No more than 1 cm
- No more than 2 cm
- No more than 5 cm
- No more than 10 cm
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Question 19 of 25

19. Question
What should be done to the paper chromatography after it has been left in the solvent?
- Left to dry
- Sprayed with water
- Distilled
- Cut up
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Question 20 of 25

20. Question
What forms during paper chromatography?
- Spots
- Crystals
- Solids
- Solvent
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Question 21 of 25

21. Question
Once the chromatogram is complete what should be measured?
- Rf values
- Ka vales
- Ra values
- Fr values
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Question 22 of 25

22. Question
What should be used to measure the distance of spots formed?
- Ruler
- Spoon
- Measuring tape
- Balance
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Question 23 of 25

23. Question
What does Rf stand for?
- Retention factor
- Resolution factor
- Retention formation
- Resolution formation
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Question 24 of 25

24. Question
What are Rf values?
- Data measurements from paper chromatography
- Lines drawn on paper chromatography
- Solvents used during chromatography
- Mixtures used during paper chromatography
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Question 25 of 25

25. Question
What is the equation to work out Rf values?
- distance moved by substance / distance moved by solvent
- distance moved by substance x distance moved by solvent
- distance moved by solvent / distance moved by substance
- distance moved by solvent + distance moved by substance
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