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3. When tested with iodine (12) a. starch gives a positive result and glucose gives a...
need help with questions 5 and 6 5. A mixture of starch and iodine (12) turns blue because a. starch is blue b. iodine (12) is blue c. starch is a chain of glucose molecules d. iodine (12) interacts with coiled starch molecules e. copper (II) ion is reduced to copper (I)ion 6. Suppose that when you test your original diluted saliva with starch-iodine, it takes 20 minutes for the color to change. You should a. add more water to...
5. How can you transform starch into a substance that gives a negative iodine test and a positive Benedict's test?
A. SOLUBILITY Conclusion Carbohydrate Observation(s) Starch Glucose Sucrose B. FEHLING'S AND IODINE TESTS 1% Sugar/Starch Fehling's Test Observation's and Conclusion Todine Test Observation(s) and Conclusion Glucose Lactose Sucrose Starch
please help me answer the following questions 33 DE CARBOHYDRATES THE Starch Carbohyd- rate class monosacchetides Precipitate PART B. SOME REACTIONS OF CARBOHYDRATES Spor Test Results with Carbohydrates Glucose Fructose Sucrose Benedict's Grick red Brick red negative negative test blues (blue) Fehling's Positive Positive Negativ test burnt orange brown l Tollens negative regate negative test clearish cleau clear Glucose oxidase test Iodine dark test blue negative | reaction mono saccharid sitive What class of carbohydrate can be expected to give...
ne. UP Sugar Jecau repa bout cam We consisting of many glucose Lules linked together. Iodine (IKI) is added to detect the presence of starch. The iodine molecules ger stuck in the spirals of the starch molecule and cause a blue-black color to appear. A red color is an indica lack color of the star the indime sad edit rum ace Name: Lab Questions from Week 3. Fill in the following: To test for the following: Reagent/indicator Test name Section...
3) A certain blood test for a disease gives a positive result 90% of the time among patients having the disease. It also gives a positive result 25% of the time among people who do not have the disease. It is believed that 30% of the population has this disease a) What is the probability that a person with a positive test result indeed has the disease? b) What is the probability that the blood test gives a negative result?...
3) Diffusion of starch will be tested for using the _test. In the absence of starch it will produce a yellow amber color of the reagent. 4) The presence of glucose can be detected using which requires minutes of boiling. 5) The plant, Elodea, will be used in today's lab to study 6) To estimate the osmolarity of potatoes, we will use the solutions as an indirect measure.
When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose
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...
Tube D represents a positive test for A) Starch B) Protein Glucose e D) Lipids