The parts without chlorophyll do not photosynthesise, and so they do not make starch and the iodine does not ... In this experiment you need to place a leaf in boiling ethanol to decolourise ...

This step is important so you can be positive that any starch present at the end of the experiment has ... fully destarched by testing a leaf for starch. If the iodine remains yellow-brown ...

The solutions used typically included hydrogen peroxide, potassium iodate, and manganese sulfate, which reacted to produce starch-iodine complex changes visible in color. The experiment ...