The Presence of Starch

Equipment

·         Evaporating Dish

·         Test Tube

·         Test Tube Rack

·         Fume Hood

·         Filter Funnel

·         Knife

·         Pestle/Mortar

·         Glass Rod

·         Pipette

·         Tongs

·         Bunsen Burner

·         Beaker

Materials

·         Iodine Solution

·         Grape Juice

·         Banana

·         Potato

·         Mineral Water

Steps

·         Divide the banana become two, added 3 drops of Iodine Solution

·         Divide the potato become two, added 3 drops of Iodine Solution

·         Put the grape juice into test tube, added 3 drops of Iodine Solution

·         Do all those things inside the fume hood

Sample	Normal Color	Color Changes (Added by Iodine Solution)
Potato	Yellow	Black
Banana	Yellow	Black/Dark Brown
Grape Juice	Soft Brown	No Changes

·         You can see the result

A Blue-Black color indicates the presence of starch. The darker the color, the greater starch it’s contain.

Why do You need Starchy foods?

Starchy foods are good source of energy and the main source of a range of nutrients in our diet. as well a starch, the contain fiber, calcium, iron, and vitamin B.