The students extracted the violet pigment from red cabbage by boiling the cabbage and filtering the pigment solution. They identified the pigment's chemical formula and observed in a graph that it strongly absorbs violet and green light, which explains its color, but does not absorb red or blue light.

1. GRUP 5
Jaume Adell, Hamza Bouderaa,

2. -We cut the Red
cabbage

3. -We extracted the
pigment of the Red
Cabbage by boiling it
in water
-We separated the
violet pigment by
filtration

4. The pigment has this chemical formula
Pigment
Dilluted with water

5. In the graph we can see the absorbtion in the violet and
green and no absorption for red and blue which gives
the colour to the pigment