To a solution of sucrose, Benedict's reagent is added and the solution is heated. What reaction would you expect and why...
To a solution of sucrose, Benedict's reagent is added and the solution is heated. What reaction would you expect and why?
Homework Answers
Answer:- As sucrose is a non reducing sugar , I think, it does not reacts with Benedict's reagent. The monosaccharides units in sucrose - glucose and fructose are bonded by glycosidic linkage in such a way that the isomerisation of glucose to open-chain aldehyde form is not possible , or the isomerisation of fructose to its open-chain ketone form is not possible.
However, sucrose solution gives positive Benedict's test, when heated with Benedict's reagent in the presenve of dil. HCl. This is because in acidic conditions and heat , the glycosidic bond between glucose and fructose gets broken down.
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To a solution of sucrose, Benedict's reagent is added and the solution is heated. What reaction would you expect and why...
You have a solution of sucrose, and a few mL of 0.4M HCl is added to...
You have a solution of sucrose, and a few mL of 0.4M HCl is added to the solution. The solution is heated. What reaction will you see when adding Benedict's reagent?
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use...
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use open chain Fisher projection). 2. Do you expect fructose to give a positive reaction with Barfoed's reagent? Explain why or why not. Indicate which of the test carbohydrates (glucose, fructose, lactose, sucrose, starch) would give 5- hydroxymethylfurfural when heated with hydrochloric acid. (See description of reactions for Barfoed's reagent and Seliwanoffs reagent). 3. 121
Date Biochemistry Survey Name Partner Answer the following questions: 1. Why did sucrose give a positive...
Date Biochemistry Survey Name Partner Answer the following questions: 1. Why did sucrose give a positive test with Benedict's solution after heating? 2. A Imagine that we heated the starch with H2SO for about 2 hours, similar to what we did with sucrose. What would you expect for the results of a test with 12 on this heated starch solution? Why? B. What would you expect as a result if Benedict's solution was added to the heated starch described above?...
1. Why does the basic (ammonia) reaction condition used with the Benedict's reagent test enable you...
1. Why does the basic (ammonia) reaction condition used with the Benedict's reagent test enable you to differentiate a possible hydrolysis of a pure synthetic sucrose sample from an incomplete synthesis of a sucrose sample in which glucose and fructose might still be present in low amounts?
Why should ketoses not react with Benedict's reagent? Think about the type of reaction and be...
Why should ketoses not react with Benedict's reagent? Think about the type of reaction and be specific!
Explain why fructose, an alpha-hydroxyketose, reacts with Benedict's reagent. What structural rearrangement is neccessary for this...
Explain why fructose, an alpha-hydroxyketose, reacts with Benedict's reagent. What structural rearrangement is neccessary for this reaction to occur
What type of reaction occurs when glucose reacts with the Benedict's solution. Explain what chemical change...
What type of reaction occurs when glucose reacts with the Benedict's solution. Explain what chemical change glucose and reagent in Benedict's solution undergoes. Give the names of products.
Would you expect the dipeptide valylalanine to give a positive reaction with nitric acid solution? Why...
Would you
expect the dipeptide valylalanine to give a positive reaction with
nitric acid solution? Why or why not?
3, Would you expect the dipeptide valylalani Why or why not? alanine to give a positive reaction with nitric acid solution? 4. In the chromatogram below, calculate an Re for each component of the mixture. Which componert is probably the more polar compound? Solvent front Origin From a book or Internet source, find the pl of the amino acid lysine. What...
What Carbohydrates, other than Ketose, produce a reddish-orange solid with Benedict's reagent and a red color...
What Carbohydrates, other than Ketose, produce a reddish-orange solid with Benedict's reagent and a red color with Seliwanoff's reagent, and why? Why does starch produce no color change with Benedict's or Seliwanoff's reagent, but turns a blue-black color with Iodine reagent?
(You will need to know what Benedict’s reagent is, the reaction conditions that are used and...
(You will need to know what Benedict’s reagent is, the reaction conditions that are used and how to interpret the experimental results.Please consider the scenario that you are working in an analytical laboratory and need to determine if a sample of synthetic sucrose is 100% pure.) 1. You ran two control experiments using the reagent; one with commercially purchased pure glucose and one with commercially purchase pure fructose. What would you expect the experimental results to show for the glucose...
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use open chain Fisher projection). 2. Do you expect fructose to give a positive reaction with Barfoed's reagent? Explain why or why not. Indicate which of the test carbohydrates (glucose, fructose, lactose, sucrose, starch) would give 5- hydroxymethylfurfural when heated with hydrochloric acid. (See description of reactions for Barfoed's reagent and Seliwanoffs reagent). 3. 121
Date Biochemistry Survey Name Partner Answer the following questions: 1. Why did sucrose give a positive test with Benedict's solution after heating? 2. A Imagine that we heated the starch with H2SO for about 2 hours, similar to what we did with sucrose. What would you expect for the results of a test with 12 on this heated starch solution? Why? B. What would you expect as a result if Benedict's solution was added to the heated starch described above?...
What type of reaction occurs when glucose reacts with the Benedict's solution. Explain what chemical change glucose and reagent in Benedict's solution undergoes. Give the names of products.
Would you
expect the dipeptide valylalanine to give a positive reaction with
nitric acid solution? Why or why not?
3, Would you expect the dipeptide valylalani Why or why not? alanine to give a positive reaction with nitric acid solution? 4. In the chromatogram below, calculate an Re for each component of the mixture. Which componert is probably the more polar compound? Solvent front Origin From a book or Internet source, find the pl of the amino acid lysine. What...
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