1.4 Extraction, adsorption and chromatography

Extraction, adsorption and chromotography

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Extraction, adsorption and chromotography

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Slide 1 - Diapositive

Extraction
Difference in solubility
Mixture: two solids

Solvent added
Followed by filtration and evaporation

Slide 2 - Diapositive

Adsorption
Difference in adhesion to solid
Activated carbon used

Removal of colourants, toxins and 
flavourins

Followed by filtration



Slide 3 - Diapositive

Demo - Decolor spiritus

Slide 4 - Diapositive

Difference between absorbtion en adsorbtion

Absorption: substance is taken up by another substance (sponge)
Adsorption only interaction on the surface (norit)

Slide 5 - Diapositive

Chromatography
Difference in solubility in the moving liquid and adhesion to paper
Result = chromatogram


Slide 6 - Diapositive

Chromotography
At the bottom you add samples on paper (stationairy phase) which is put solvent (mobile phase)
Samples will partially be drawn up with the
liquid

Dots on same height are same substances


Slide 7 - Diapositive

Lab experiment - Paper chromotography

Slide 8 - Diapositive

What is paper chromotography based on?
A
Difference in boiling points
B
Difference in adhesion to the paper
C
Difference in solubility in the moving liquid
D
B and C

Slide 9 - Quiz

What is not a seperation method?
A
Distillation
B
Chromatography
C
Elektrolysis
D
Filtration

Slide 10 - Quiz

What type of mixture can be extracted?
A
Solution
B
Suspension
C
Emulsion
D
Mixture of solids

Slide 11 - Quiz

What difference in substance properties is adsorption based on?
A
Particle size
B
Adhesion
C
Solubility
D
Boiling point

Slide 12 - Quiz

Making tea:
What separation methods are used?
A
evaporation - filtration
B
evaporation - extraction
C
extraction - evaporation
D
extraction - filtration

Slide 13 - Quiz

Adsorption works ...
A
only with water and gas masks
B
only with water
C
with water, gas masks and fume hoods
D
only with gas masks

Slide 14 - Quiz

How do you seperate a mixture of sand and salt?
A
Decantation, filtration and evaporation
B
Extraction and filtration
C
Extraction, filtration and evaporation
D
Evaporation and filtration

Slide 15 - Quiz

Is sample 3 a pure substance or a mixture?

Slide 16 - Diapositive

Is sample 3 a pure substance or a mixture?
A
Pure substance
B
Mixture

Slide 17 - Quiz