Required Practical: Investigating Chromatography (AQA GCSE Chemistry Combined Science): Flashcards
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Practise the cards
12 cards from this deck
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Practise the cards
12 cards from this deck
Purpose of paper chromatography
Purpose of paper chromatography
Separate & identify coloured chemicals in mixtures
Distance of pencil line from short edge
Distance of pencil line from short edge
2 cm
Why use pencil not ink for baseline
Why use pencil not ink for baseline
Ink would dissolve in the solvent
Depth of solvent in beaker
Depth of solvent in beaker
About 1 cm deep
Position of ink spot relative to solvent
Position of ink spot relative to solvent
Just above surface, must not touch solvent
What covers beaker during chromatography
What covers beaker during chromatography
Watch glass
When to remove chromatography paper
When to remove chromatography paper
When solvent front is about 1 cm from top
What is the solvent front
What is the solvent front
Where the solvent stopped moving
Where is ink spot placed initially
Where is ink spot placed initially
On centre of pencil line
Where to measure from for ink spots
Where to measure from for ink spots
From centre of each spot
Formula for value
Formula for value
Purpose of value
Purpose of value
Identifies chemicals by how far each moved vs solvent