Topic+4c

Topic 4c: Phantom


 * __Carbohydrates__**-Any of a group of organic compounds that includes sugars, starches, celluloses, and gums and serves as a major energy source in the human body

__**WEBSITE SOURCE**__: [|**http://www.answers.com/topic/carbohydrate**]


 * __EXPLAINATION__:** Carbohydrates are organic compounds that serve as major source of energy for our bodies.

Jon C.

Sugars are one example of a simple carbohydrate.
 * Source:** [|**http://kidshealth.org/kid/stay_healthy/food/carb.html**]

Foods such as breads, spaghetti, and meats are all high in carbohydrates. Cody F.
 * Source:** []



The following pictures were taken during the sugars lab. They are of four different solutions containing unknown sugars or possibly nothing at all.

-Benedicts Solution Test Iodine Solution Test---

Benedicts Solution after acid If sucrose is present it will be by itself. Use the reference table and the pictures to identify the contents of the four unknowns.


 * ** Sugar ** || ** Positive Results ** || || ** Unknown Solutions ** || ** Contents ** ||
 * ** glucose ** || Benedicts solution turns from blue to orange after heating || || ** Solution A ** || ||
 * ** Starch ** || Iodine turns from golden brown to black || || ** Solution B ** || ||
 * ** Sucrose ** || Benedicts solution turns from blue to orange **//only after reacting with acid//** || || ** Solution C ** || ||
 * There are no other interactions between sugars and indicators. || || ** Solution D ** || ||

Nicholas R. The benedict's solution changed after the acid was added in test tube D. So that must mean test tube D was heated. Or it would turn orange once the acid is added. During the iodine test all of them turned into a yellow solution except test tube B.