through A4. Place five drops of Iron (III) Nitrate into rows B1 through B4. Place 5 drops of copper (III) nitrate into rows C1 through C4. Now you will place four different ionic solutions in each column 1 through 4. Place five drops of Potassium Iodide in column 1A‚ 1B and 1C. Place five drops of sodium sulfate in column 2A‚ 2B‚ and 2C. Place five drops of sodium hydroxide in column 3A‚ 3B‚ and 3C. Place five drops of sodium chloride in column 4A‚ 4B‚ and 4C. Record the color of a precipitate that
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about 20 kb size Agarose in pulsed electric field: for very large fragments Acrylamide Convenient for smaller DNA fragments Polyacrylamide is formed by cross-linking chains of acrylamide with methylene-bis-acrylamide in the presence of Ammonium Persulphate and TEMED (Tetramethyl-ethylene-diamine) Tracking Dyes Xylene cyanol Bromophenol blue Ethidium Bromide An intercalating dye As little as 0.05 µg of DNA in one band can be detected as visible fluorescence when the gel is illuminated
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Thyroid hormones are essential for the body to function normally. To achieve this purpose‚ the thyroid hormones must be present in the body in the correct amount -- not too little and not too much. Hyperthyroidism is the medical term applied to an over-active thyroid gland with consequent excess secretion of thyroid hormones (T3 and T4)‚ causing the body to “speed up.” Hyperthyroidism with an enlarged thyroid gland is more popularly known as toxic goiter. What are the causes of hyperthyroidism
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Synthesis of Phenacetin laboratory manual was followed without any major changes. Data and results Compound Amount used MW (g/mol) Moles Stoichiometry/Comments acetaminophen 0.354 g 151.16 2.34 x 10-3 limiting reagent ethyl iodide 0.3mL 155.97 3.75 x 10-3 1.6 equiv ’s sodium ethoxide 2.6mL 68.05 3.3 x 10-2 catalyst‚ reaction solvent crude product obtained: phenacetin 0.32g 179.22 1.78 x 10-3 yield = 76.06% Recrystallized product: phenacetin 0.16g 179
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I did this lab to find out the differences between chemical and physical changes. I also did this lab to learn the signs that would indicate the chemical reactions and physical changes. I needed to learn the odor change‚ color change‚ bubbles or gas‚ irreversible‚ temperature changes and finger prints. By the end of the lab‚ my goal was to be able to didtinguish easily the difference between chemical and physical changes. Question #1 answer. 1. Gas. 2. Dissolved in water. 3
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Anthony Young Partner: Nick Dale TA: Alekhya 6/15/15 The SN2 Reaction: Factors Affecting SN2 Reaction. Introduction In the substitution reactions‚ the leaving group from the substrate is replaced with the nucleophile. Because of the nucleophile it is called nucleophilic substitution. The lone pair of electrons‚ present on the nucleophile is used to create a new bond with the carbon atom‚ from which the leaving group was separated. There are two different mechanisms of nucleophilic substitution: SN1
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to measure the rate of the oxidation/reduction reaction because it occurs much faster but is still dependent upon the other reaction. To accomplish this‚ two mixtures were prepared in separate Erlenmeyer flasks. In the 250 ml flask .010M potassium iodide‚ .0010M Sodium thiosulfate and distilled water was prepared. A 125 ml flask was also prepared with a mixture of .040M potassium bromate‚ hydro chloric acid and
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function‚ but not so long as to cause damage. Iodine-131 is one of the most widely used isotopes. It is supplied in capsules or liquid of a specific activity designed to be swallowed by patients. Iodine is a naturally occurring element known as Iodide. It has many uses in nuclear medicine‚ where it is used as a tracer to diagnose and treat certain diseases‚ such as an overactive or cancerous thyroid gland. There are only two naturally occurring isotopes of iodine that are I - 127 (stable)
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St. Joseph School/ Ramallah Chemistry lab Report Students name: Laila Salah Date of exp: 11 /4/2013 Partner’s name: Wattan Date of sub: 25 /4/2013 T.Dima Mogannam kaibni Class: 11thsci.stream -------------------------------------------------------------------------------------------------------------
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This experiment was a Landolt Iodine clock reaction - Oxidation of Bisulphite by Iodate. It involved conducting three measured experiments. The first variable tested was concencentration. This was tested by conducting two experiments‚ each varying the concentration of either the NaHSO3 or KIO3. The varying of NaHSO3 involved using 0.1 Molar of KIO3 against decreasing concentrations of NaHSO3 (0.25 M‚ 0.125 M‚ 0.0625 M and 0.03125 M). When decreasing the concentration of KIO3‚ 0.25 M of NaHSO3 was
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