You Need to Know How to Test a Leaf for Starch Flashcards
1
Q
What do you need to do first?
A
Kill the leaf
2
Q
How do you kill the leaf?
A
Dunk it in boiling water
3
Q
Why do you need to kill the leaf?
A
So no chemical reactions happen inside the leaf
4
Q
What do you do second?
A
Put the leaf in a boiling tube with some ethanol and heat the tube in a water bath
5
Q
Why do you need to do this?
A
So there’s no chlorophyll in the leaf
6
Q
What colour should the leaf turn?
A
White-ish
7
Q
What do you do last?
A
Rinse leaf in cold water and add iodine solution to it
8
Q
What will happen if starch is present?
A
It will turn blue-black
