The first lab will investigate the movement of glucose and starch across a selectively permeable membrane through a process of diffusion. The movement of a solute through this membrane is called dialysis . Diffusion is a form of passive transport. It is the movement of molecules from areas of higher concentration to those of lower concentration‚ until there is an even concentration. This movement is random because it is a result of kinetic energy. Diffusion is a slow process‚ but there are many factors
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Austin Peay State University Department of Chemistry CHEM 1021 IDENTIFYING CARBOHYDRATES (adapted from Blackburn et al.‚ Laboratory Manual to Accompany World of Chemistry‚ 2nd ed.‚ (1996) Saunders College Publishing: Fort Worth) Purpose: To become familiar with some of the characteristic reaction of carbohydrates. To identify an unknown carbohydrate. Caution: Wear eye protection because of the possible shattering of dropped glassware and because acids are used in this experiment
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The effect of Sodium Chloride (NaCl) salt concentration on osmosis in potato cells The movement of substances in plant cells involves many processes and systems‚ all of which may affect the plant bio-chemically and physically‚ and one of these processes is osmosis. Osmosis is the flow of water through a semi-permeable membrane of a cell moving from an area of higher water potential to an area of lower water potential until reaching equilibrium known as isotonic. Before reaching the point of being
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your mixture‚ discuss the possibilities for the mixture. The starch and mixture 2 are both similar because they both did not penetrate when the vinegar was added; when the water was added the laid on top and did not penetrate completely; when the iodine solution was added to both they it turned black. Mix 1 would be substances 2 and 4; Mix 2 would be 1 and 5. Compare
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Thermometer Spotting tiles Pipette Water baths (at different temperatures) Iodine Measuring cylinder Method: 1. Collect equipment and set up as shown in diagram. 2. Fill a boiling tube with 10cm of starch and another with 5cm of enzyme. 3. Place both in a water bath at 20 degrees. 4. Wait until both test tubes reach equilibrium‚ test this with a thermometer. 5. Fill 30 spots on the spotting tile with 2 droplets of iodine. 30 spots are enough for 15 minutes‚ which is the maximum time the reaction
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The Kinetics of the acid-catalyzed iodination of propanone Raw Data: Solution A:Propanone 2M Solution B: Iodine 0.005M Solution C: Sulfuric acid 1M Solution D: Distilled water Table 1 Experiment Volume of solution A ±0.05 (cm3) Volume of solution B ±0.05 (cm3) Volume of solution C ±0.05 (cm3) Volume of solution D ±0.05 (cm3) Total Volume ±0.2 (cm3) 1 2 2 2 4 10 2 4 2 2 2 10 3 6 2 2 0 10 4 2 1 2 5 10 5 2 0.5 2 5.5 10 6 2 2 4 2 10 7 2 2 6 0 10 Table 2 Experiment Time for yellow color to disappear
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releasing carbon dioxide. Osmosis is a special type of diffusion‚ which occurs when water is diffused across the membrane. This can be affected by how hydrophilic a solute is on either side of the membrane. The diffusion of glucose‚ starch‚ and iodine was observed when the solutes went from a higher concentration of their individual solute to a lower concentration diffusing threw pores in the dialysis bag. The experiment sought to find out which solutes would diffuse threw the pores of the dialysis
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Introduction The student nurse chose this case study to discover more about the disease process and how to impart more therapeutic interventions that would lend a hand to the patient to recover better as soon as possible. Cast an eye over more facts about the disease and how significant each signs and symptoms the patient is manifesting and its effect to the body of the patient. This case abets the student nurse to obtain appropriate knowledge as well as gain understanding that will be used further
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chemistry-react.org/go/Faq/Faq_27906.html What is the use of starch solution in the clock reaction of the reduction of peroxodisulphate (Ⅵ)ions by iodide ions - http://www.chemistry-react.org/go/Faq/Faq_27122.html I am doing my coursework on the iodine clock reaction - http://www.chemistry-react.org/go/Faq/Faq_26765.html I am having difficulty in working out the Arrhenius equation. Are
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Concentration of Sodium Chloride and the Rate of Reaction of Enzyme Amylase Research Question: How will changing the percentage of sodium chloride concentration affect the rate of reaction of enzyme amylase‚ measured using the absorbance of starch and iodine with a spectrophotometer. Introduction: Amylase is an enzyme that is involved in the human digestive process. Found in both the human pancreas and the human saliva‚ amylase breaks down starch into sugar so that large molecules can be easily digested1
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