Chromatography Model Exploration Worksheet
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Chromatography Model Exploration Worksheet
How the model works
Chromatography is a method for separating parts of a mixture. In paper chromatography, a small spot of ink sits above the liquid level on paper. The liquid travels up the paper and carries some ink components with it. Different components travel different distances because they interact differently with the liquid and the paper. A component that dissolves well in the liquid may travel farther; one that sticks more strongly to the paper may travel less far. The separated bands can help identify what a mixture contains, but this model does not create new substances.
Evidence from the lab
Three marker inks were tested using identical strips of paper and the same solvent. Each starting ink spot was placed 1 cm above the solvent. After 10 minutes, the team measured how far each visible color band traveled from its starting spot.
Marker ink
Separated bands observed
Band distances (cm)
Number of bands
Black
blue, yellow, pink
6, 3, 1
3
Green
yellow, blue
5, 2
2
Purple
blue, red
4, 2
2
Analyze and explain
Use the lab notes and results table as evidence. Write complete answers where a reason is requested.
- A method that separates parts of a mixture
- A method that turns one substance into another
- A way to make a liquid evaporate instantly
- A method that makes every ink color travel the same distance
- They interact differently with the paper and the moving liquid.
- They are both changed into gases.
- The paper makes one component disappear.
- The cup pushes each color upward at a different time.
3 printable pages
Page 1
Page 2
Page 3
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