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1.4 Extraction, adsorption and chromatography
Extraction, adsorption and chromotography
Paragraph 1.4
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Scheikunde
Middelbare school
havo
Leerjaar 3
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Extraction, adsorption and chromotography
Paragraph 1.4
Slide 1 - Tekstslide
Extraction
Difference in solubility
Mixture: two solids
Solvent added
Followed by filtration and evaporation
Slide 2 - Tekstslide
Adsorption
Difference in adhesion to solid
Activated carbon used
Removal of colourants, toxins and
flavourins
Followed by filtration
Slide 3 - Tekstslide
Demo - Decolor spiritus
Slide 4 - Tekstslide
Difference between absorbtion en adsorbtion
Absorption: substance is taken up by another substance (sponge)
Adsorption only interaction on the surface (norit)
Slide 5 - Tekstslide
Chromatography
Difference in solubility in the moving liquid and adhesion to paper
Result = chromatogram
Slide 6 - Tekstslide
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 - Tekstslide
Lab experiment - Paper chromotography
Slide 8 - Tekstslide
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 - Quizvraag
What is not a seperation method?
A
Distillation
B
Chromatography
C
Elektrolysis
D
Filtration
Slide 10 - Quizvraag
What type of mixture can be extracted?
A
Solution
B
Suspension
C
Emulsion
D
Mixture of solids
Slide 11 - Quizvraag
What difference in substance properties is adsorption based on?
A
Particle size
B
Adhesion
C
Solubility
D
Boiling point
Slide 12 - Quizvraag
Making tea:
What separation methods are used?
A
evaporation - filtration
B
evaporation - extraction
C
extraction - evaporation
D
extraction - filtration
Slide 13 - Quizvraag
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 - Quizvraag
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 - Quizvraag
Is sample 3 a pure substance or a mixture?
Slide 16 - Tekstslide
Is sample 3 a pure substance or a mixture?
A
Pure substance
B
Mixture
Slide 17 - Quizvraag
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