Homework Answers
You can get the answer using the given result as
Benedict test gives result for monosaccharide and disaccharides so option (a) is not correct
Barfoed's test is used for detecting the presence of monosaccharide.the test result shows negative which means the carbohydrate is not monosaccharide . We can get the ans using these two but also using the other two results
Salwanoff's test is for disaccharides which shows positive result and iodine test is for Starch which is a polysaccharide and the test shows a negative result
So option (b) Disaccharides is correct .
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what type of carbohydrate is the unknown
6. In lab a student performed experiments to determine...
CHM 380 Laboratory Manual Name: Lab #4: Pre-Lab Assignment Complete in advance and turn in at...
CHM 380 Laboratory Manual Name: Lab #4: Pre-Lab Assignment Complete in advance and turn in at the beginning of class. 1. For each of the following sugars, answer the questions by filling in the table. (You may use the textbook or any other source for help on this.) Carbohydrate Is it a Reducing Sugar (has a free anomeric carbon)? Monosaccharide or Disaccharide? Aldose or ketose sugar (or both)? Glucose Fructose Sucrose Lactose 2. Based on those results, and the information...
1-10 help!!! 1) A carbohydrate that gives two molecules when it is completely hydrolyzed is known...
1-10 help!!!
1) A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a A) monosaccharide. B) disaccharide. C) polysaccharide. D) starch. 2) A reducing sugar gives a precipitate of silver metal with Benedict's reagent. a. True b. False 3) Cellulose will give a positive Benedict's test. Sa TrueS b. False 4) The product of oxidation of an aldose is a carboxylic acid. Sa True b. False 5) Maltose is a reducing sugar. a. True b....
A student analyzes a sample which produces a positive Molisch Test followed by a negative Iodine/Potassium...
A student analyzes a sample which produces a positive Molisch Test followed by a negative Iodine/Potassium Iodide Test followed by a positive Benedict's Test followed by a positive Barfoed's Test followed by a positive Seliwanoff's Test. The sample is: A. a starch B. a ketose C. an aldose which does NOT have five carbons D. none of the above
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...
Please, fill in first table for Seliwanoff's Test for Ketoses. Additional info is found in the...
Please, fill in first table for Seliwanoff's Test for Ketoses.
Additional info is found in the images following table. (Second
table is info and image following).
Part C: Seliwanoff's Test for Ketoses Seliwanoff's Test Results Test Tube Sample Prediction Ketose? (Y/N) Observations Distilled water Peach / no change Glucose Peach to red slowly Fructose deep red solution very quickly Sucrose deep red solution quickly Lactose Peach to red slowly Starch Peach to red very slowly Mystery sample Peach to red...
3. Complete the table below. For each test, indicate what you will observe if the test...
3. Complete the table below. For each test, indicate what you will observe if the test is positive. Then state what a positive test will tell you about each of the carbohydrates you are testing. test expected observation for a positive test substance indicated by a positive test Ca) (b) potassium iodide/iodine (KI/1.) starch test Benedict's test (e) Bial's test 79 4. Examine the structure of maltose in Figure 2 and the flowchart in Figure 3. Predict the results of...
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...
1. (2 pts) What is produced when polysaccharides and disaccharides are hydrolyzed? 2. (2 pts) A...
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 solution for you). When performing the Benedict's test and the others), why is it necessary for YOU to make...
A student performed a series of measurements (volume/mass) of an unknown liquid in order to determine...
A student performed a series of measurements (volume/mass) of an unknown liquid in order to determine its density. Using a graduated cylinder, the student added an amount of unknown liquid to the graduated cylinder, then recorded the mass and volume of the liquid. The student repeated the process several times, adding more liquid each time and recording the mass and volume. The student plotted the data (mass on y-axis, volume on x-axis). The resulting data table and graph looked like...
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...
CHM 380 Laboratory Manual Name: Lab #4: Pre-Lab Assignment Complete in advance and turn in at the beginning of class. 1. For each of the following sugars, answer the questions by filling in the table. (You may use the textbook or any other source for help on this.) Carbohydrate Is it a Reducing Sugar (has a free anomeric carbon)? Monosaccharide or Disaccharide? Aldose or ketose sugar (or both)? Glucose Fructose Sucrose Lactose 2. Based on those results, and the information...
1-10 help!!!
1) A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a A) monosaccharide. B) disaccharide. C) polysaccharide. D) starch. 2) A reducing sugar gives a precipitate of silver metal with Benedict's reagent. a. True b. False 3) Cellulose will give a positive Benedict's test. Sa TrueS b. False 4) The product of oxidation of an aldose is a carboxylic acid. Sa True b. False 5) Maltose is a reducing sugar. a. True b....
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...
Please, fill in first table for Seliwanoff's Test for Ketoses.
Additional info is found in the images following table. (Second
table is info and image following).
Part C: Seliwanoff's Test for Ketoses Seliwanoff's Test Results Test Tube Sample Prediction Ketose? (Y/N) Observations Distilled water Peach / no change Glucose Peach to red slowly Fructose deep red solution very quickly Sucrose deep red solution quickly Lactose Peach to red slowly Starch Peach to red very slowly Mystery sample Peach to red...
3. Complete the table below. For each test, indicate what you will observe if the test is positive. Then state what a positive test will tell you about each of the carbohydrates you are testing. test expected observation for a positive test substance indicated by a positive test Ca) (b) potassium iodide/iodine (KI/1.) starch test Benedict's test (e) Bial's test 79 4. Examine the structure of maltose in Figure 2 and the flowchart in Figure 3. Predict the results of...
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...
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 solution for you). When performing the Benedict's test and the others), why is it necessary for YOU to make...
A student performed a series of measurements (volume/mass) of an unknown liquid in order to determine its density. Using a graduated cylinder, the student added an amount of unknown liquid to the graduated cylinder, then recorded the mass and volume of the liquid. The student repeated the process several times, adding more liquid each time and recording the mass and volume. The student plotted the data (mass on y-axis, volume on x-axis). The resulting data table and graph looked like...
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...
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