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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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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depending on sugar concentration. A green precipitate means a little glucose was present. A red precipitate means glucose is present in vast amounts. Food Test 2: Test for Starch – with Iodine solution. Iodine solution is used to identify the presence of starch- a complex carbohydrate. Iodine solution (potassium iodide solution) reacts with amylase – a type of starch – whereby a blue-black polyiodide complex is formed. Method 1) Mix smalls amount of each food samples (i.e.‚ Egg lumen
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medications used for this are Tapazol and Propyl-Thyracil. Radioactive iodine is taken either as a liquid or in capsule form and is used to destroy the thyroid gland or any other thyroid cells. The duration of the treatment can be extended to 8-18 months. The surgery that is mainly used for Graves’ disease is called Thyroidectomy. This is a procedure that removes a portion or all of the thyroid gland. If you have had radioactive iodine treatment or surgery‚ you will need to take replacement thyroid hormones
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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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buret‚ 10mL of HCL‚ and 20mL of distilled water. Once we had those three in the gradated cylinder we put 10mL of iodine in a test tube and we placed both in the 500 mL beaker with thermometers in each solution to ensure that they were all the same temperature when we added the iodine. As soon as all the solutions reached the desired temperature (22 degrees Celsius) we poured the iodine into the graduated cylinder and started timing the reaction. 6. As soon as the reaction stopped‚ we stopped
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1. Introduction: This lab focused on showing the reaction that takes place between zinc and iodine using only deionized water instead of acetic acid (or vinegar) as we did in the previous lab by adding acetic acid to zinc iodide. The purpose of this lab was to see how water created the reaction and another compound or precipitate. Focus Question: Zn(OH)2 was the product when zinc and iodine were reacted without the presence of acetic acid in the water. Confidence Report: I am confident that
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Heating A. Benedict’s Solution +Heat B. Iodine Solution C. Biuret Reagent 1. Protein Solution Purple Light Purple Dark Orange Light Purple 2. Glucose Solution Light Blue Orange-yellow Light Orange Transparent
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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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