Required Practical: Investigating Chromatography (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is paper chromatography used for?
What is paper chromatography used for?
Separate & identify coloured chemicals
How far from the short edge should the pencil line be drawn?
How far from the short edge should the pencil line be drawn?
2 cm
Why must you use a pencil and not ink to draw the starting line?
Why must you use a pencil and not ink to draw the starting line?
Ink would dissolve in the solvent
How deep should the solvent be in the beaker?
How deep should the solvent be in the beaker?
About 1 cm deep
What tool is used to place the ink onto the pencil line?
What tool is used to place the ink onto the pencil line?
A pipette
Where should the ink spot be positioned relative to the solvent?
Where should the ink spot be positioned relative to the solvent?
Just above the solvent surface
What should be used to cover the beaker during the experiment?
What should be used to cover the beaker during the experiment?
A watch glass
When should the paper be removed from the beaker?
When should the paper be removed from the beaker?
When solvent is 1 cm from the top
What should be marked with pencil after removing the paper?
What should be marked with pencil after removing the paper?
The solvent front
When measuring ink spots, where should you measure from?
When measuring ink spots, where should you measure from?
The centre of each spot
What is the formula for calculating the value?
What is the formula for calculating the value?
What does the value help to identify?
What does the value help to identify?
The different chemicals in the ink