helps to remove the dichloromethane. Then‚ you’re only left with the caffeine‚ effectively isolating it. In order to bring it back from the current state its in due to the evaporation however‚ acetone hot acetone and petroleum ether are needed2. These cause the caffeine to “bottom out”‚ and turn to a solid. Acetone is polar so it’ll allowed for the dissolving of the caffeine‚ and the cooling is what helped form the
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Chemistry Project on Evaporation of Liquid Acknowledgement I would like to show my gratitude to my Chemistry Teachers Ms Seema More without whose support and encouragement this project could never have have taken the present shape . I would also like to thank my lab incharge Mr. Kakde For helping Me out During The Practical Part Of This Project. Aim Acknowledgment I am are greatly thankful for the cooperation and help from the Community Science Center (CSC) authorities and the Chemistry lab
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GRAM STAIN THEORY: The most widely used staining procedure in microbiology is the Gram stain‚ discovered by the Danish scientist and physician Hans Christian Joachim Gram in 1884. Gram staining is a differential staining technique that differentiates bacteria into two groups: gram-positives and gram-negatives. The procedure is based on the ability of microorganisms to retain color of the stains used during the gram
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In this experiment the substances that were used were acetone‚ methanol‚ water‚ 1- butanol and ethyl acetate. Acetone is the organic compound with the formula (CH₃)₂CO. It is a colorless‚ volatile‚ flammable liquid‚ and is the simplest ketone. It takes 21 seconds for it to completely disappear. It was the first to evaporate among all tested substances. The reason for this is that this molecule is not attracted to another molecule of Acetone by hydrogen bonding because although there are hydrogen
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Likeness of polarity of solutes and solvents Compound Ethanol V. Oil Acetone Water MISCIBLE IMMISCIBLE MISCIBLE Ethanol ------------- IMMISCIBLE MISCIBLE Acetone MISCIBLE IMMISCIBLE -------------- V. Oil IMMISCIBLE ------------- IMMISCIBLE Table 3. Miscibility of some liquid substances with each other. Compound Ethanol (Polar) V. Oil (Non-polar) Acetone (Polar) Water (Polar) LIKE UNLIKE LIKE Ethanol (Polar) ----------- UNLIKE LIKE Acetone (Polar) LIKE UNLIKE ------------ V. Oil (Non-polar) UNLIKE -------------
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reactions are an important class of reactions because of their synthetic utility and importance in understanding the mechanism of a variety of organic reactions. Materials & Methods: (Effect of Structure of the Alkyl Halide) 2mL of 15% of NaI in acetone was put into three test tubes. Two drops of 1-bromobutane were added to the first test tube. Two drops of 2-bromobutane were added to the second test tube. Two drops of 2-methyl-2-bromobutane were added to the third test tube. The test tubes were
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Laboratory #6 Qualitative Tests for Carbonyls: Aldehydes vs. Ketones Introduction Various chemical tests identifying ketones and aldehydes are used in this experiment in order to identify an unknown carbonyl compound. The tests used are: 2‚4-dinitrophenylhydrazone test‚ Tollen’s Test‚ Benedict’s Test‚ Chromic Acid Test‚ aka Bordwell-Wellman Test‚ Schiff’s Test‚ and Iodoform Test. These classification tests provide results based on color change or formation of precipitation‚ which is then used
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Slightly hazardous in case of skin contact (irritant) Ammonium Bromide (NH4Br) 97.94 452 Soluble in water Hazardous in case of eye contact (irritant)‚ of ingestion‚ of inhalation. 1-Butanol (C4H10O) 74.12 -89.8 Soluble in water. Very soluble in acetone‚ miscible with ethanol‚ ethyl ether Very hazardous in case of skin contact (irritant‚ permeator)‚ of eye contact (irritant)‚ of ingestion‚ of inhalation. Slightly hazardous in case of skin contact (sensitizer). Dichloromethane (CH2Cl2) 84.93
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a man-made matter constructed by a A. Dianin‚ a Russian scientist‚ in 1891. When the examiner first tried working on synthesizing bisphenol A‚ he came up with two phenol groups‚ which have a chemical formula of C6H6O‚ and integrated them with an acetone group‚ which has a chemical formula of C3H6O. This whole process of producing bisphenol A required a third substance that would effectively maximize the rate of the reaction. Mr. Dianin then realized that the only thing that would noticeably accelerate
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described. In order to convert these substances into safrole (III) and o-safrole (IV)‚ respectively‚ methylenation was carried out‚ with moderately good yields‚ by gently refluxing them with methylene iodide and anhydrous potassium carbonate in dry acetone solution. By employing such mild conditions‚ any change into the isomeric isosafroles during the course of the reaction was inhibited. The identity of the synthetic product with naturally occurring safrole has been established by preparing the pentabromo-derivative
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