A student Investigated where starch was made in a leaf Sho used a leat that was part green and part white as shown in the diagram.
Part A
White
Part B
Green
This is the method used,
1.
2
Put the leaf in boiling water for 1 minute.
Reason: stops all chemical reactions in the leaf
Transfer the leaf to boiling ethanol for 5 minutes
Reason: removes the green colour
Dip the leaf in hot water,
Reason: softens the leaf
Spread the leaf on a white tile and test with loding solution
Reason: stains any starch.
3.
4
(d) If the chemical reactions in the seat were not stopped, the amount of starch in the leaf
would decrease
Give the reason why