Introduction Methyl Salicylate has been used for a long time for its pleasant odour and flavour. The objective of this experiment was to carry an organic synthesis; the preparation of salicylic acid from methyl salicylate. To do an organic synthesis‚ it is needed to chemically modify the molecules of another compound to end up with the desire compound. Methyl salicylate is the major constituent of wintergreen oil‚ which is why it was used in this experiment as the starting material. The new technique
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How to do a Deadly EEI in Chemistry Students: These are some hints about the requirements of a high quality Extended Experimental Investigation for the Queensland Senior Chemistry Syllabus. Guidelines given to you by your teacher should take precedence if there is any doubt. They are addressing a Year 12 EEI but will still guide you for Year 11. They refer to a hypothesis-testing EEI. What’s the purpose of an EEI? You‟ll do an EEI to research a question you have about some chemistry-related phenomena
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Chem 1212L-345 Lab report Experiment #20: Temperature Change and equilibrium Woochul Jin Jeeyoon Kong‚ Alla Asmerom Hagos 03/22/2011 Woochul Jin Chem 1212L-345 Experiment #20 Lab Report Temperature change and equilibrium Introduction: In this experiment‚ we will find out how the variation of the value of an equilibrium constant with temperature can be used to determine the enthalpy (heat)‚ entropy (randomness)‚ and free energy (G) changes associated with the system in question
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CHEM RESEARCH TASK 1. INDICATORS Identify and describe some everyday uses of indicators including the testing of soil acidity/basicity. • Indicators are used regularly in chemical laboratories during chemical reactions. One important use is to determine the end point of a titration when an acid reacts with an alkali. The reactants and products of such a reaction are colourless so an indicator is a useful way to visually determine when the reaction is complete. Chemists also need to monitor
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Course Name Fundamentals in Chemistry Course Code: CHEM 101 Course Provider: The Division of Arts‚ Sciences and General Studies Level 1 Semester in which course is offered: 1 No. of Credits: 4 Total Study Hours: 56 Course Description: This course introduces students to the fundamental concepts in chemistry. It explores the structure of the atom‚ bonding between atoms/particles‚ the concept of the mole‚ redox reactions‚ kinetic theory and energetics. A laboratory component will be
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Rod Vanderhuge Period 2 Lab Title II. Data Collection and Processing A. Data Collection Amount of Substance (g) Uncertainty ±0.01g | Water Added (mL)Uncertainty ±0.05 cm3 (mL) | 3.30 g Pb(NO3)2 | 50.00 mL | 4.00 g KI | 50.00mL | 11.90 ±.06 g PbI2 (The uncertainty of this value differs from the uncertainty value of the other masses) | N/A | The qualitative data taken was that the compound created was a yellow precipitate‚ and when the water was poured through the funnel in order
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IGSCE Chemistry Notes Oxides Oxides are used to determine whether an element is a metal or a non-metal. Most non-metals are classed as acidic oxides. While most metals are classed as basicoxides. Acidic Oxides * Reacts with water to form acids * Neutralises alkaline solution to form salt + water Basic Oxides * Neutralises acidic solutions to form salt + water Amphoeteric Oxides * These are non-metals which display both acidic and basic properties Alkaline Oxides * Reacts
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Chem - Med Company Case # 02: Question # 1: Rate of Sales growth for the year 2006 is 25% where as the sales growth projected for the year 2007‚ 2008 and 2009 is 40%. Question # 02: Income growth in the year 2006 was 50.13%. The forecasted income growth in 2007 is 39.91%‚ 2008 is 20.76% and 2009 is 49.41%. The income
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EXPERIMENT 5- A FISCHER ESTERIFICATION SYNTHESIS OF PEAR OIL One of the major uses of Esterification (C(=O)-C-R) is forming compounds with different odors which can be used to make different synthetic and natural flavorings. Using the chemical and physical properties of organic compounds‚ an ester was catalyzed from the reaction of a carboxylic acid with an alcohol‚ producing an odor similar to that of pear oil. The mechanism of this Fischer- Esterification process is outlined as follows:
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Rafa Mwais Professor Hermann Chem 157 Paper #5 May 28‚2013 Crystal Structure of the Catalytic Portion of Human HMG-CoA Reductase 3-hydroxy-3methylglutaryl-CoA reductase (HMGR) catalyzes the formation of mevalonate in the biosynthesis of sterols and isoprenoids. The activity of this enzyme is regulated physiologically through synthesis‚ degradation and phosphorylation to maintain to maintain the concentration of the mevalonate-derived products. Transcription and translation of HMGR increase
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