1. What are the three products you would get from hydrolyze starch?
2. If your sample is possitive with iodine test, what does it mean?
1. What are the three products you would get from hydrolyze starch? 2. If your sample...
you will be performing an iodine test for the presence of starch in the slab what observation in this experiment will tell you when all starch has been hydrolyzed into simpler products
What would you multiply "moles of iodine" by to get the units "grams of iodine"? What would you multiply "atoms of sulfur" by to get the units "moles of sulfur"? What would you multiply "moles of rubidium" by to get the units "atoms of rubidium"? How many grams of F are there in a sample of F that contains the same number of moles as a 34.0 gram sample of Al?
Can the iodine test distinguish between amylose and amylopectin? What Would you look for? Can sucrose act as a reducing sugar? Explain your answer. In the acid-catalyzed hydrolysis of starch, how can you tell when the hydrolysis of starch is complete? Why does the test work this way? What is the monosaccharide that results at the end? Polysaccharides generally do not give a positive test with Fehling's solution. Why?
“-” represents a clear/yellow solution, “+” represents a light
blue solution, and “++” represents a dark blue solution.
1. 1% glucose - observation: negative. Starch not present
2. 1% starch - observation: ++. Starch present
3. 1% starch + amylase #1 (body temperature). Observation:
negative. Starch not present
4. 1% starch + amylase #2 (body temperature). Observation:
negative. Starch not present.
5. 1% starch + amylase #1 (high temp). Observation: +. Starch
present
6. 1% starch + amylase #2 (high...
When measuring your starch samples in a spectrophotometer, what sort of results would you expect to see if there were: a. different concentrations of starch in two tubes? b. How could you tell if there was the same concentrations of starch in two tubes? c. How could you tell if there was no starch in a tube?
Experiment 33 PART B. SOME REACTIONS OF CARBOHYDRATES Spor Test Results with Carbohydrates Sucrose Carbohyd- Starch Fructose Glucose rate class Benedict's test Fehling's test Tollens test Glucose oxidase test Iodine test What class of carbohydrate can be expected to give a positive test with the spot tests below? Benedict's glucose oxidase Fehling's iodine Tollens Hydrolysis of polysaccharides Test Results Results of Result from Benedict's test strips Solution Result from iodine test Initial starch Initial sucrose Initial cellulose Final starch Final...
6) What would you observe in each of the following cases and provide an explanation. a) A dilute solution of iodine is added to an aqueous solution of starch. b) The solution is placed in boiling water. c) The solution is cooled in running water. d) An aqueous starch solution is treated with Fehling's solution and placed in boiling water. Would you expect the result to be the same as that for D- glucose? Explain. e) A stock solution of...
someone help me with these 7 questions
add a drop of iodine solution. If starch is present, I Wl iodine. The starch-iodine complex is deep blue-violet. Repeat this test with a com- mercial aspirin tablet and with the acetylsalicylic acid prepared in this experiment O N S at is the purpose of the concentrated phosphoric acid used in the first step? What would happen if the phosphoric acid were left out? 2. 1. Wh 3. If you used 250 mg...
What would you multiply "grams of iodine" by to get the units "atoms of iodine" ? What would you multiply "grams of sulfur" by to get the units "atoms of sulfur" ? What would you multiply "atoms of rubidium" by to get the units "grams of rubidium" ?
What Was - starch hydrolysis results in formation of Formed glucose, fructose etc. based on the enzym Upon I mode of action. The color of Fehlings Digestion? sovhon turns to yedbi cause the Sugarne - copped (11) to copper in fenungs sowho PROBLEMS 1. What purpose does amylase serve in the hydrolysis of starch? Why did the color of the iodine test change over time? Be specific about the reaction that is occurring (substrate and product). 2. Should there be...