A simple experiment can demonstrate the release of oxygen by photosynthesis in qualitative fashion. Shoots of waterweed (elodea canadensis) are kept under a lid in a culture jar. The emerging bubbles are trapped under an assimilation bell jar. Once a reasonable amount of gas has collected, the cock can be opened and the released gas can be identified as oxygen by means of a glowing splint.
| Materiallist (Excerpt) |
Product |
Amount |
|
Balance OHAUS LG 311, 4 beams, 0...311 g
|
44007-31
|
1
|
|
Assimilation bell jar
|
64844-00
|
1
|
|
Water, distilled 5 l
|
31246-81
|
1
|
|
Culture vessel
|
64834-00
|
1
|
|
Sodium dithionite, pure 250 g
|
31623-25
|
1
|
|
Indigo carmine, 10 g
|
31383-03
|
1
|
|
Liquid paraffin 250 ml
|
30180-25
|
1
|
|
Ungrad.Cylinder 250ml, 200x40 mm
|
34213-00
|
3
|
|
Pipettor
|
36592-00
|
1
|
|
Wood splints,l=35cm,d=3mm,200pcs
|
39126-20
|
1
|
|
Culture vessel cover, slotted
|
64847-00
|
1
|
|
Graduated cylinder 100 ml
|
36629-00
|
1
|
|
Pipette with rubber bulb
|
64701-00
|
1
|
|
Bottle,nar.mouth,100ml,amber,pl.s
|
41111-01
|
2
|
|
Cotton wool, white 200 g
|
31944-10
|
1
|
|
Graduated pipette 10 ml
|
36600-00
|
1
|
|
Spatula,stirrer, 245 mm, plastic
|
38834-00
|
1
|
|
Glass rod,boro 3.3,l=300mm, d=7mm
|
40485-05
|
1
|
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