Testing a leaf for starch

Question 1

What is used to test for starch

Answer 1

Iodine solution is used to test leaves for the presence of starch.

Question 2

Instructions

Answer 2

heat a plant leaf in boiling water for 30 seconds
add the leaf to boiling ethanol in a water bath for a few minutes
wash with water to rehydrate and soften the leaf and spread onto a white tile
add iodine solution from a dropping pipette
After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black.