Proved when exposed to light? What are the conditions necessary for this synthesis?
air
1 Importance of light and chlorophyll
Procedure
Doc. e An
Consider three pelargonium plants: the first
Get four leaves: a parti-colored, a totally
has green leaves and is kept in darkness, the
covered, a partially covered and a totally
second has green leaves and is exposed to exposed to light leaf.
sunlight for one day, and the third has parti-
colored leaves and is also exposed to sunlight Put the four leaves in hot alcohol placed in a
for one day
water bath for ten minutes (to avoid the
burning of alcohol) in order to dissolve
Take two leaves from the second plant, entirely chlorophyll. After cooling, dip them in iodine
cover one leaf and partially cover the second water.
with opaque covers.
Doc. a The leaf kept in darkness
how to prove the presence of starch aw