ingested is excreted in the feces; however‚ a small amount is absorbed by the liver‚ kidneys‚ and bones. Co-60 absorbed by the liver‚ kidneys‚ or bone tissue can cause cancer because of exposure to the gamma radiation. Iodine 131 Let’s start with iodine-131 (I-131). This radioisotope of iodine has a half-life of 8 days and emits both beta-particles and gamma radiation (see Figure‚ above) (3-5). The beta-particles‚ which cause 90% of the tissue damage‚ are comparatively energetic‚ travel a maximum of 2
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simultaneously.1 This experiment employed titration involving the use of iodine. Iodometry is the titration process where iodine is used as titrant for strong reducing agents. Another type of titration where iodine is involved is called iodometry‚ where iodine “is produced in-situ from the quantitative oxidation of iodide and then subsequently titrated with thiosulfate solution‚”2 being the difference from the former type of iodine titration. Iodometry is more widely used‚ as in this experiment‚ because
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flatter then others. No odor detected. Iodine and Water mixture: Crushed iodine still visible in water. Over color of mixture changed from clear to clear with orange amber hue. Iodine and Mineral Oil: Crushed iodine slightly visible in oil. Dramatic change in color; oil changed from clear into rich purple. Iodine and Alcohol: No visible pieces of Iodine present in solution. Change of color from clear to dark brown. Potassium Solution and Iodine: Immediate reaction between the two components
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Materials: Metric ruler‚ razor blades‚ potato pieces‚ paper towels‚ iodine Purpose: to identify why cells are so small. Hypothesis: Make a statement as to which potato cubes will diffuse the closer to the center of a cell (small‚ medium‚ large. __________________________________________________________________________________________________________________________________________________________________________ Dimensions For Experiment 3 Cubes with sizes A) 0.5 cm B) 1.0
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Lab report Aim : To check the presence of starch in the leaves Hypothesis : the presence of starch can be detected if the specimen turns black blue after iodine solution. Materials : 1) Green leaves 2) Wire gauze 3) Iodine solution 4) Forceps 5) Specula 6) Bunsen’s burner 7) Test tube 8) Water 9) Tile 10) tripod stand 11) glass 12) slide 13) dropper 14) water 15) water bath Procedure: collect dark green leaves (as leaves contain starch) take a water bath and let it heat
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The three-drops of the mixture simultaneously added with two drops of iodine solution were dropped onto the first well of a spot plate and was labelled as the zero minute. Incubation should be continued and after a one-minute interval‚ three-drops of the mixture simultaneously added with two drops of iodine solution were dropped onto the second well of a spot plate and was labelled as one minute. The test tube of the iodine solution should not be exposed. It should be covered with a cork and wrapped
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concentration of the ascorbic acid in the tablet‚ a redox reaction of it with iodine was done. While iodine is an oxidizing agent and ascorbic acid is a reducing agent. The reaction forms dehydroascorbic acid and iodide. Ascorbic acid + I2 -> dehydroascorbic acid + 2 H+ + 2 I- However‚ Iodine does not dissolve in water very well. In this case‚ standard solution of potassium iodate(V) is used to produce aqueous iodine. Excess potassium iodide and dilute sulphuric acid is added to react with potassium
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the reaction between iodine and acetone in acid solution: For this reaction‚ you will determine the order of the reaction with respect to acetone and HCl and find a value for the rate constant‚ k. Since the concentrations of acetone and HCl are much higher than that of I2‚ the concentrations of acetone and HCl will change very little. Thus the rate will be determined by the time needed for iodine to be used up. Iodine has color so you can easily follow changes in iodine concentration visually
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and frequency. Through this test the vibrational frequency‚ force constant‚ reduced mass and point group were obtained for each of the molecules created. In addition the energy in Hartee for each molecule was also obtained. The molecules used were Iodine (I2)‚ Carbon Monoxide (CO)‚ Cyanide ion (CN-)‚ Acetonitrile (CH3CN) and Benzene (C6H6). The energy equations used previously allows one to solve the Schrodinger equation for molecular energies. The Hamiltonian operator in the energy equation‚ containing
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higher concentration to an area of lower concentration. Because of the selective permeability of the membrane only water and other very small particles (iodine) can be diffused through simple diffusion. The solution out of the dialysis tubing had a higher distelled iodine concentration of solutes (iodine + H2O) than did the starch solution. So iodine move into the cell and react with starch molecules to formed starchiodine‚ the blue compound‚ with a specific rate. The test show that mean rates of
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