Materials
- 8 sealable plastic bags, large enough to contain a whole apple/pear and banana
- 4 ripe bananas
- 8 unripe unripe pears or 8 unripe apples (pears usually are sold unripe, so they may be a better choice than apples)
- potassium iodide (KI)
- iodine (I)
- distilled water
- graduated cylinders
- large brown glass or plastic bottle (not metal)
- shallow glass or plastic tray or dish (not metal)
- knife for cutting fruit
- Do not use metal utensils or containers for preparing or storing the iodine solutions. Iodine is corrosive to metals.
- The iodine solutions will stain skin and clothing.
- Read the safety information for chemicals used in the lab and follow safety precautions.
- After the experiment is completed, the stain may be washed down the drain.
