Required Practical: Investigating Chromatography (AQA GCSE Chemistry Combined Science): 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?
Separating & identifying coloured chemicals
Why must you use a pencil, not ink, to draw the starting line?
Why must you use a pencil, not ink, to draw the starting line?
Ink would dissolve in the solvent
How far from the short edge should you draw the starting line?
How far from the short edge should you draw the starting line?
2 cm
How deep should the solvent be in the beaker?
How deep should the solvent be in the beaker?
About 1 cm deep
Where should the ink spot be when you place the paper in the beaker?
Where should the ink spot be when you place the paper in the beaker?
Just above the solvent surface
What should you use to cover the beaker during the experiment?
What should you use to cover the beaker during the experiment?
A watch glass
When should you remove the paper from the beaker?
When should you remove the paper from the beaker?
When solvent is 1 cm from top of paper
What should you mark with pencil after removing the paper?
What should you mark 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?
Centre of each spot
What is the formula for calculating value?
What is the formula for calculating value?
What does the value help to do?
What does the value help to do?
Identify different chemicals in ink
Why must the ink spot not touch the solvent initially?
Why must the ink spot not touch the solvent initially?
It would dissolve before separating