1. Carbohydrate Identification Lab
Results & Conclusion

2. Results: Which of the solutions reacted to Benedict’s Solution?
Monosaccharide-Known
Honey
Apple Juice
Milk (in some classes)

3. Results: Which of the solutions reacted to Iodine Solution?
Polysaccharides
Oat Water
Rice Water
Milk (a little bit)

4. Results: Which of the solutions did not react at all?
Disaccharides
Sugar Water

5. Conclusion: (a) Mono, Di or Polysaccharides?
Reaction with Benedict’s  Monosaccharides Present
Benedict’s only reacts with Monosaccharides
Honey, Apple Juice and Milk contains monosaccharides
You saw a orange-yellow-brown color change, resulting from Benedict’s solution!

6. Conclusion: (b) Structure of Molecules & Benedict‘s
Reacted w/Benedict’s  Monosaccharide
Monosaccharide = 1 sugar
Structure of Honey, Apple Juice & Milk:
The carbohydrate was made of individual, single sugar units.
Most likely glucose or fructose.

7. Conclusion: (c) Mono, Di, or Polysaccharides?
Reaction with Iodine  Polysaccharides Present
Iodine only reacts with Polysaccharides
Oat Water, Rice Water & Milk contains polysaccharides
You saw a blue-black color change, resulting from Iodine reaction!

8. Conclusion: (d) Structure of Molecules & Iodine
Reacted w/Iodine  Polysaccharides
Polysaccharide = Many Sugars
Structure of Oat Water, Rice Water & Milk:
The carbohydrates were large molecules, made of repeating sugar units.
Most likely starchy.

9. Conclusion: (e) Mono, Di, Polysaccharides?
No Reaction  Disaccharide
No Color Change Ever  Disaccharide
Sugar Water must contain disaccharides

10. Conclusion: (f) Structure of Molecules & Nada
No Reaction  Disaccharides
Disaccharide = 2 or Double Sugar
Structure of Sugar Water:
Made of double sugar units
Most likely sucrose or sucralose

11. Conclusion: (g) Solutions & Long Energy
Oat Water & Rice Water:
Largest Carbohydrates
Most Bonds  Most Energy over Long Period

12. Conclusion: (h) Solutions & Quick Energy
Honey & Apple Juice:
Small Carbohydrates
Few Bonds  Little Energy over Short Period