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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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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boiling points of the elements down group VII from Fluorine to Iodine. All of the halogens exist as diatomic molecules (F2‚ Cl2 and I2) the intermolecular attractions between the molecules hold them together. The larger the molecule (as it moves down the halogen group) the bigger the intermolecular forces are between electrons because with more rings the distance between each electron is larger. The larger elements such as Bromine and Iodine are larger molecules with a larger amount of intermolecular
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and accumulation of radioactive iodine in thyroid 2. Name the Independent Variable. thyroid activity 3. Name the Controlled Variables. gender‚ age 4. Why was RIA used to measure Thyroxine while IRMA was used to measure TSH? RIA is used to measures the thyroxine levels in the blood‚ while the IRMA measures high or low levels of TSH being released. 5. How was it used to observe relative amount of iodine accumulated by thyroid gland? RAI measures the amount of iodine that is absorbed by the thyroid
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Lab Report Title: * Color reaction of starch when mixed with Iodine solution Introduction: Statement: * How would the varying solutions react when introduced with the Iodine solution? Hypothesis: * If a solution is rich in starch then it will react with iodine solution and change to a bluish-black color (looks Brown) Materials: Items: * 8 test tubes‚ pipet‚ iodine‚ onion juice‚ potato juice‚ sucrose solution‚ glucose solution‚ distilled water‚ fructose solution‚ starch solution
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temperature for these enzymes. The amylase was mixed with starch at temperatures of 0℃‚ 37℃‚ 57℃‚ and 90℃. Iodine was added to each mixture and colour changes in each case. Bacteria amylase was found to be effective at 55 0C as the temperature dropped drastically from 4.58℃ to 2.33℃. This shows that the amylase catabolized a lot of starch hence little is left which cannot turn the iodine solution to blue-black which indicates the presence of starch. Fungal amylase is denatured at 90 ℃. This was
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Results Table 1: Experimental results for part A Trial 1(L) Trial 2(L) Trial 3(L) Trial 4(L) Trial 5(L) Initial Reading 0 0 0 0.4 0.9 Final Reading 19.7 19.1 18.9 19.7 19.9 Titre Value 19.7 19.1 18.9 19.3 19 Table 1 above displays the titres obtained during 5 trials in part A of this assay. The titre values procured in trial 2‚ trial 3 and trial 5 manifests an agreement within 0.1mL. However‚ the result achieved in trial 1 and 4 are outliers because of their distance from other observations
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microscopic examination‚ starch grains‚ onion cells and cheek cells are observed .Difference between starch grains‚ onion cells and cheek cells could be differentiate. Materials: * * Small piece of potato‚ * distilled water‚ * iodine solution * a petal of onion * methylene blue solution * cheek cells. Apparatus: * * Cork barrier * glass slides * cover slips * light microscope * Forceps * Knife * filter paper * Dropper
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