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Carbohydrate Identification Lab

Carbohydrate Identification Lab. Results & Conclusion. Results: Which of the solutions reacted to Benedict’s Solution?. Monosaccharide-Known Honey Apple Juice Milk (in some classes). Results: Which of the solutions reacted to Iodine Solution?. Polysaccharides Oat Water Rice Water

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Carbohydrate Identification Lab

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  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

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