Homework Answers
- Sucrose is a non-reducing sugar and thus does not react with Benedict's reagent. But heating sucrose (usually with dil. HCl) breaks the glycosidic bonds in sucrose through hydrolysis and thus it gives a positive result with Benedict's solution.
- Starch gets hydrolysed also when heated with H2SO4 for a couple of hours hence it will also give a positive result with Benedict's solution. However it will no longer give a positive result with I2 assuming that the entire starch content of the solution gets hydrolysed.
- The answer will depend based on the sample you used for the experiment.
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Date Biochemistry Survey Name Partner Answer the following questions: 1. Why did sucrose give a positive...
chemistry
Imagine that we heated the starch with H2SO4 for about 2 hours, similar to what we did with sucrose. What would you expect for the results of a test with I2 on this heated starch solution
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?
please fill out chart and answer applicable questions attached for thumbs up Part 1: Characterization of...
please fill out chart and answer applicable questions attached
for thumbs up
Part 1: Characterization of carbohydrates with and without digestion by enzymes (You can refer to the complete Lab Procedure which is posted separately for more information about this part of the lab.) You are given a set of samples: starch, sucrose, and glucose. The samples are tested before and after different enzymes are added. After the enzymes are added, the samples are incubated in a 37°C water bath...
Date Soap Name Partner Answer the following questions. • From the pH test, what is one...
Date Soap Name Partner Answer the following questions. • From the pH test, what is one property of soap that you now know? Hint: phenolphthalein turning pink indicates 2. Assume you have washed all NaOH away. 2. The Ca"? and Mg2 tests should have given a solid material with "Your Soap Solution." These solids are insoluble soap salts commonly known as "Bath Tub Scum." • From your results, what can you conclude about the hardness of our tap water? Explain...
REPORT SHEET Date Esters Name Partner Answer all of the following: 1. Name any three of...
REPORT SHEET Date Esters Name Partner Answer all of the following: 1. Name any three of the esters formed in this experiment: Carboxylic Acid Alcohol Name of Ester 2. Why are artificial flavors and/or odors not quite the "real thing?" 3. Although we did not make it, methyl butanoate has the scent of apples. Identify the two substances you would use to synthesize this compound. 4. In the saponification reaction, when HCl was added in procedure #6, a solid should...
2130 D. HYDROLYSIS OF DISACCHARIDES and POLYSACOLARIDES Make sure you understand what you are doing bore...
2130 D. HYDROLYSIS OF DISACCHARIDES and POLYSACOLARIDES Make sure you understand what you are doing bore Both the lodine Test and Benedict's best becau described below. Label test tubes so they are t s See the datatable for any that you pre heated in a hot waterbuch e e h 1. You will need 4 test tubes, 1 and 2 forstarch and dowe l of such to test tubes 1 and 2 Add a small pinch of sucrose to test...
Pre-Lab Questions (PLQ) for Exp. 9 Carbohydrates (sugars) Use the information in Exp. 9 to answer the following que...
Pre-Lab Questions (PLQ) for Exp. 9 Carbohydrates (sugars) Use the information in Exp. 9 to answer the following questions 1. (2 pts) What is produced when polysaccharides and disaccharides are hydrolyzed? 2. (2 pts) A monosaccharides can exist as an open chain or as a cyclic compound. Which form is more stable? 3. (4 pts) Sucrose is the only carbohydrate for which it is necessary to make a fresh solution (all of the other carbohydrates will already be prepared in...
Properties of Organic Compounds Found in Cells Name: Blog Section POST-LAB QUESTIONS / HOMEWORK 1. In...
Properties of Organic Compounds Found in Cells Name: Blog Section POST-LAB QUESTIONS / HOMEWORK 1. In addition to performing the Benedict's test on different types of solutions, why is it also performed on water as a control? 2. What is the difference in structure between a polysaccharide and a disaccharide? 3. a. Name two polysaccharides found in plants. b Name a polysaccharide found in animals. 4. All polypeptides are made up of amino acids joined by peptide bonds. What makes...
Can someone help me with the color reactions, positive and negative control, and the 6 questions?...
Can someone help me with the color reactions, positive
and negative control, and the 6 questions?
Sudan IV Test for Lipid 1. Obtain five test tubes and number them 1-5. Your instructor may ask you to test some additional materials. If so, include additional numbered test tubes. 2. To each tube, add the materials listed in Table 3. 3. Add five drops of water to tube 1 and five drops of Sudan IV to each of the remaining tubes. Mix...
Hello can you answer the incorrect question ? X Incorrect 1) What group does the Benedict's...
Hello can you answer the incorrect question ?
X Incorrect 1) What group does the Benedict's test oxidize? A. A ketone B. More than one of these C. An ether D. An aldehyde X (Your Answer) X Incorrect 3) If you have a polysaccharide, what color is it when mixed with lodina? A. Deep brown X (Your Answer) B. Deep violet C. Light Brown D. Prussian red X Incorrect 4) What sugar was negative to the Benedict's test? A. Fructose...
please fill out chart and answer applicable questions attached
for thumbs up
Part 1: Characterization of carbohydrates with and without digestion by enzymes (You can refer to the complete Lab Procedure which is posted separately for more information about this part of the lab.) You are given a set of samples: starch, sucrose, and glucose. The samples are tested before and after different enzymes are added. After the enzymes are added, the samples are incubated in a 37°C water bath...
Date Soap Name Partner Answer the following questions. • From the pH test, what is one property of soap that you now know? Hint: phenolphthalein turning pink indicates 2. Assume you have washed all NaOH away. 2. The Ca"? and Mg2 tests should have given a solid material with "Your Soap Solution." These solids are insoluble soap salts commonly known as "Bath Tub Scum." • From your results, what can you conclude about the hardness of our tap water? Explain...
REPORT SHEET Date Esters Name Partner Answer all of the following: 1. Name any three of the esters formed in this experiment: Carboxylic Acid Alcohol Name of Ester 2. Why are artificial flavors and/or odors not quite the "real thing?" 3. Although we did not make it, methyl butanoate has the scent of apples. Identify the two substances you would use to synthesize this compound. 4. In the saponification reaction, when HCl was added in procedure #6, a solid should...
2130 D. HYDROLYSIS OF DISACCHARIDES and POLYSACOLARIDES Make sure you understand what you are doing bore Both the lodine Test and Benedict's best becau described below. Label test tubes so they are t s See the datatable for any that you pre heated in a hot waterbuch e e h 1. You will need 4 test tubes, 1 and 2 forstarch and dowe l of such to test tubes 1 and 2 Add a small pinch of sucrose to test...
Pre-Lab Questions (PLQ) for Exp. 9 Carbohydrates (sugars) Use the information in Exp. 9 to answer the following questions 1. (2 pts) What is produced when polysaccharides and disaccharides are hydrolyzed? 2. (2 pts) A monosaccharides can exist as an open chain or as a cyclic compound. Which form is more stable? 3. (4 pts) Sucrose is the only carbohydrate for which it is necessary to make a fresh solution (all of the other carbohydrates will already be prepared in...
Properties of Organic Compounds Found in Cells Name: Blog Section POST-LAB QUESTIONS / HOMEWORK 1. In addition to performing the Benedict's test on different types of solutions, why is it also performed on water as a control? 2. What is the difference in structure between a polysaccharide and a disaccharide? 3. a. Name two polysaccharides found in plants. b Name a polysaccharide found in animals. 4. All polypeptides are made up of amino acids joined by peptide bonds. What makes...
Can someone help me with the color reactions, positive
and negative control, and the 6 questions?
Sudan IV Test for Lipid 1. Obtain five test tubes and number them 1-5. Your instructor may ask you to test some additional materials. If so, include additional numbered test tubes. 2. To each tube, add the materials listed in Table 3. 3. Add five drops of water to tube 1 and five drops of Sudan IV to each of the remaining tubes. Mix...
Hello can you answer the incorrect question ?
X Incorrect 1) What group does the Benedict's test oxidize? A. A ketone B. More than one of these C. An ether D. An aldehyde X (Your Answer) X Incorrect 3) If you have a polysaccharide, what color is it when mixed with lodina? A. Deep brown X (Your Answer) B. Deep violet C. Light Brown D. Prussian red X Incorrect 4) What sugar was negative to the Benedict's test? A. Fructose...
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