Resources
Extraordinary or unique resources (human or material) needed to successfully complete this experience:

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Materials needed for the lab were simple and inexpensive. Each group of two students required:

* vitamin C indicator solution
* three 50 mL beakers or medicine cups
* one 10 mL graduated cylinder
* three disposable pipettes
* one stirring rod
* Sources of Vitamin C: freshly squeezed OJ, bottled OJ, frozen OJ, canned OJ
* Optional: container for waste solutions and source of clean rinse water

There are two different preparations (starch-iodine or indophenol) that may be used for the vitamin C indicator solution. Neither is more accurate than the other. The starch-iodine mixture is much cheaper. It can be made ahead and stored in a dark, cool place in two liter soda bottles and dispensed in liter containers at the lab stations. Both indicators vary from one preparation to the next; so an......

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Title: Vitamin C Investigation
Approximate Word Count: 490
Approximate Pages: 2 (250 words per double-spaced page)

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