Synthesis‚ Recrystallization of β-D-Glucose Pentaacetate from its Original D-Glucose and it comparison with literature though Melting point‚ TLC‚ IR‚ 1H and 13C NMR Abstract: The synthesis of the product: β-D-glucose pentaacetate is done though the acetylation using acetic anhydride with D-glucose with the help of sodium acetate. The recrystallization of the product is done though a polar solvent like water. The Result of this experiment has a percentage yield of 61% and analytical methods
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2-(2‚4-Dinitrobenzyl) pyridine Peter Defnet and Cody Krepps Department of Chemstry Juniata College Huntingdon‚ PA September 18‚ 2012 Abstract: Nitration of 2-benzylpyridine is supposed to yield 2-(2‚4-Dinitrobenzyl) pyridine‚ when electrophilic aromatic substitution is the mechanism. Experiencing many pitfalls‚ however‚ has lead to the actual product obtained to contain the expected product‚ as well as many impurities. This report examines the supposed mechanism for the electrophilic substitution
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EXPERIMENT 1: REACTIONS OF ENOLATE IONS WITH CARBONYL GROUPS Aims In this experiment we used two techniques for the reactions of enolate ions with carbonyl groups. One technique used was Doebner reaction and the other technique used was Claisen-Schmidt reaction. Therefore the aim of this experiment is to synthesize trans p-methoxycinnamic acid and to synthesize dibenzalacetone via an aldol condensation reaction between acetone and benzaldehyde. The products would be recrystallized using ethanol
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Geology Test 3 What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust? Regional What are the local rocks under our feet called? Caliche A rock is hydrothermally altered by burial. If the rock is buried to 3 km deep and the local geothermal gradient is 25 degrees Celsius per km‚ then how hot is the rock? 75 degrees Celsius Which of following minerals will dissolve completely during weathering? Calcite Marble forms when one
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Exp.11) Identification of unknown ketones. Introduction: Given five samples of a known ketone derivative‚ the purpose of this experiment is to identify which unknown ketone derivative corresponds to the five known samples. In other words‚ using specific methods of compound detection‚ it is possible to match an unknown compound with a known compound because similar compounds will display similar characteristics. In this experiment‚ identification of the unknown ketone is accomplished through thin
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Describe in basic terms how elements were/are formed during the big bang (including the reasons why only H/He formed abundantly)‚ during normal stellar operation (including why some elements such as Si and Fe were formed more abundantly)‚ and during supernova processes/explosion Big bang only thing that forms out of the big bang is the nuetrons. Protons plus electrons = hydrogen. Hydrogen fuses the helium. There are no stable atoms with 5 or 8 nucleons (hydrogen would have 5‚ helium would have
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EAR 105 extra-credit study guide. This is both a study guide and an extra credit assignment worth 10 points on your exam! Using your class notes and the book‚ please answer the following questions with words or with sketches. Use this as a study guide. Remember‚ it will count as extra credit toward your test grade. You may work in groups of 4 or less. If you do work in groups‚ all names go on ONE copy that is handed to me. You may work on separate sheets of paper‚ or answer using this document
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List of Graphs Page No. 1.1: Trend line showing voluntary labour turnover………………………………12 1.2 Market Share of major steel producers in India………………………………15 4.1: ABC Classification of inventory items in ATPL…………………………….58 List of Figures 1.1 The four factors of production……………………………………………….10 1.2 The Channels of distribution used by ATPL…………………………………20 1.3 The Production Process………………………………………………………27 1.4 The line diagram of a Tube-Mill……………………………………………..30
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in the formation of the plastics of many different products humans use daily. In commercial production‚ the para‚ para’ isomer (p‚p’) is the preferred product. The ortho‚ para’- BPA isomer is also produced but in low levels and is removed by recrystallization. BPA can come in the form of a white to tan crystal‚ flake‚ or powder. This compound has a mild phenolic odor yet it is not volatile. BPA is not sold directly for consumer use but serves as the raw material that makes up the polymers used to
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Extraction of Caffeine from Lipton® Tea Leaves Nathaniel Camangon*‚ Kaila Bumagat‚ Franz Mari Burgos‚ Remigio Callanta Department of Chemistry‚ College of Science‚ University of Santo Tomas‚ Manila‚ Philippines Abstract This experiment mainly focuses on the extraction of pure caffeine by multiple extraction from commercially acquired tea leaves and determining its purity by melting point determination. A 0.02% yield of pure caffeine was obtained from 10.4978g of tea leaves (4 tea bags).
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