Lab #2 (Part A‚B) Due date: Oct 5‚ 2010 1 - Theory and mechanism Epoxidation is a reaction of an alkene with a peroxycarboxylic acid (also called peracid) to produce an epoxide product‚ generally performed in inert solvents‚ such as dichloromethane. The epoxide product is a cyclic ether in which the ring contains three atoms. The alkene gains an oxygen from the peracid in a syn fashion. In this experiment‚ R-(－)-carvone is reacting with MCPBA‚ a peracid‚ to produce the epoxide product.
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Sc Science test KEY STAGE 3 TIER 5–7 Paper 1 First name ________________________________________________ Last name ________________________________________________ School ________________________________________________ 2009 Remember I The test is 1 hour long. I You will need: pen‚ pencil‚ rubber‚ ruler‚ protractor and calculator. I The test starts with easier questions. I Try to answer all of the questions. I The number of marks available
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SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2 CHEMISTRY JC2 Preliminary Examination Paper 1 Multiple Choice Additional Materials: Data Booklet Optical Mark Sheet (OMS) 9647/01 23 August 2011 1 hour READ THESE INSTRUCTIONS FIRST On the separate multiple choice OMS given‚ write your name‚ FIN/NRIC and class in the spaces provided. Shade correctly your class and FIN/NRIC number. Eg. If your NRIC is S9306660Z‚ shade S9306660Z for the item “index number”. There
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Citric acid is used mainly for home use‚ for getting rid of lime scale (kettles‚ baths‚ toilets)‚ in hard water areas. Citric acid is a weak acid found in fruits such as lemons and oranges. Like other acids‚ citric acid can help you remove stains and rust deposits from toilet bowls without causing any damage to the porcelain surface. Citric acid contains just enough acidic concentration to get the job done without etching or damaging household surfaces in any way. It doesn’t harm the environment
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Lab: 5 Experiment:13 Pre-Lab The purpose of this experiment is to observe an equilibrium reaction counteracting changes to it’s system all in accordance to Le Chatelier’s principle. An equilibrium reaction can be pushed toward products or reactant based on changes in temperature or concentration. The reversibility of reaction will also be looked at. Pre-Lab questions 1. The concentrations of products and concentrations of reactants remain constant but both reactions
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Bio 6 (Mon. Lab) 5/6/13 The Effects of Pepsin VS. Trypsin in The Digestion of Protein Introduction As food is mechanically and chemically digested through our oral cavity then passes through our pharynx and down our esophagus‚ our food then enters the stomach. The stomach‚ being the main organ for storage‚ also helps with breaking down our food‚ but in order to accomplish that our pancreas helps by excreting an inactive digestive enzyme called pepsinogen. Pepsinogen is the inactive form
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16-3 Red Cabbage Juice pH Indicator Sources: Prof. George Ewing’s C100 Demonstration Notes; Prof. Carolyn Huffman’s Fall ’93 C100 lecture; B. Z. Shakhashiri‚ 1989‚ Chemical Demonstrations: A Handbook for Teachers of Chemistry‚ vol. 3‚ pp 162-166. Description and Concept: Red cabbage juice will change to a variety of colors when added to solutions of various pH. Red cabbage juice is a pH indicator. Materials: red cabbage* blender hot or boiling water filter paper (coffee filters
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structure of a _________ gas. Use pictures and words to describe each type of bonding: Ionic Fill in this table: Ionic Compound Ratio of ions in compound Sodium chloride Na+ : Cl1:1 Magnesium oxide Formula of compound Covalent MgO Ca2+: Cl1:2 CaCl2 Metallic Fill in this table of more complicated ions: Name of ion Formula of ion Calcium hydroxide‚ Ca(OH)2 hydroxide NO3CO32Suphate Example of compound Mg(NO3)2 Sodium carbonate CaSO4 KEY WORDS: Electronic structure Covalent bonding Ionic
Free Atom Electron Ionic bond
cations will form different colors when they are burned or added base. In these two experiments‚ scientist took some sample of barium hydroxide (Ba (OH) 2·H2O)‚ ferric chloride (FeCl3·6H2O)‚ copper chloride (CuCl2· 2H2O)‚ calcium chloride anhydrous (CaCl2)‚ potassium carbonate crystal (K2CO3· 2H2O)‚ strontium chloride hexahydrate (SrCl2· 6H2O)‚ lead nitrate (Pb (NO3) 2)‚ sodium chloride (NaCl) and magnesium chloride hexahydrate (MgCl2· 6H2O). In the first experiment‚ scientist used wet splint to dip
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An investigation into the total acid content of assorted brands of lemon and lime soft drink Abstract: The aim of this experiment was to determine the total levels of carbonic acid concentration in 3 differing brands of lemon and lime soft drinks. Research Question: Does the acid content in three different lemon and lime flavoured soft drink brand differ significantly? The purpose of this investigation is to calculate the total acid content within different brands of lemon
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