Experiment 1: Viscosity of Liquids Victoria Kulczak Lab Partners: Laina Maines & Heidi Osterman Date of Lab: 2/21/11 Due Date: 2/28/11 Abstract: The goal of this experiment was to determine the viscosity of given liquids. Two different methods were employed‚ the first measures time of flow of several methanol-water solutions‚ from point A to point B. The second method involves dropping a foreign object‚ in this case a sphere‚ into a cylinder of glycerol and measuring the time it takes for it to
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components obtained herein. For column chromatography‚ the sample prepared was loaded into a Pasteur pipette plugged with cotton and uniformly packed with silica gel. The eluents used were 7 mL hexane:acetone (7:3)‚ 5 mL hexane:acetone (1:1)‚ 5 mL acetone‚ and 5 mL acetone:MeOH (1:1); the collected eluates were dark green‚ light green‚ yellow green‚ and yellow. For thin layer chromatography‚ the eluates were applied in spots on a TLC plate pre-coated with silica and placed in a developing chamber lined
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THE HILL REACTION: EFFECT OF HERBICIDES (CLEAROUT 41 PLUS AND DIURON 50 WP) IN CORN (ZEA MAYS) LEAVES JENNY A. ADTOON ELIEZER B. GALOPE II SANDY FAYE D. SALMASAN JYAN DESSE M. SOLANO MARIANNE KRISTELLE E. YARRA INTRODUCTION Photosynthesis sustains almost all of the living world directly or indirectly. It is the process of converting light energy to chemical energy of sugars and other organic compounds. The process depends on the interaction between two sets of reactions‚ namely the
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primary and secondary alcohol. 2. Provide the type equation used in Chromic acid test. Answers: Primary alcohols; alcoholaldehydescarboxylic acid Note: A mixture of sodium dichromate or potassium dichromate in dilute sulfuric acid and acetone can also be used as Jones reagent. Secondary alcohols are oxidized to its corresponding ketones. 3. Show the sample equation involved in the reaction between Chromic acid agent and your samples/ which gave a positive result. Ethanol
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carbocation. 5. You ran 2 “qualitative” tests for unsaturation on your product. a. Describe what you observed when the Baeyer (KMnO4) test was run on your sample. After four drops of the product was placed in a small beaker along with ~0.5ml of acetone‚ three drops of KMnO4 was added. The mixture soon turned into a darkish brown color which concludes a positive for a Baeyer test. b. Describe what you observed when the Br2 in CH2Cl2 test was run on your sample. Once again‚ four drops of the
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Flower power Introduction Perfumes and scented products are composed of toxic chemicals like acetone‚ toluene‚ ethyl acetate‚ formaldehyde and ethanol that are found on any list of toxic and hazardous chemicals. All these and other chemicals used in the manufacture of personal care products have been shown in animal studies to cause serious health problems and even death. That’s why we decided to create a natural perfume that is safe for the environment. So we thought that we must encourage
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showed that the most polar molecule within each pigment traveled the least far up the chromatography paper‚ which is also polarized. The least polar pigment traveled the farthest up the paper since it was more attracted to the non polar solvent ( acetone) and polarized chromatography paper. In addition‚ the results of the separation of pigments yielded from the chromatography paper was then cut in separate pieces and placed into cuvettes. These cuvettes contained samples of each pigment and were
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out by the lab assistant or instructor. Consider that the nucleophiles may be influenced by interactions with the solvent. These interactions are much more significant in protic solvents (e.g.‚ water and alcohol) than in aprotic solvents (e.g.‚ acetone or DMSO). Experimental Procedure
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Charles W. Virgill Organic Lab Report Extraction Separation of a Carboxylic Acid‚ a Phenol‚ and a Neutral Substance Purpose The objective of the experiment is to identify the three substances in the mixture and to determine the percent recovery of each from the mixture. The unknown will consist of either benzoic acid or 2-chlorobenzoic acid‚ 4-t-butyl phenol. Determine the weight of crystals and also the percent yield Introduction There are various techniques of
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Materials and Methods Animals The Animal Ethics Committee of the Experimental Toxicology Unit from Medical College of Villa Clara‚ Cuba‚ approved experimental protocol. Male and female Wistar rats were used. All rodents and their food were purchased at the National Center of Laboratory Animal Production (Havana‚ Cuba).Animals were kept in specific pathogen–free conditions. Room temperature was 22 ± 2 °C on a 12-h:12-h light:dark cycle. Access to food and water was ad libitum. Sucrose Metabolic Syndrome
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