A Report of Experiment 1 Purification and Identification of An Unknown Mixture Aim To separate a mixture of a neutral (ester‚ alcohol‚ ketone‚ aldehyde or ether) and an acidic compound (phenol or carboxylic acid) or a neutral and a basic compound (amine)‚ and to identify the unknown mixture by physical (M.P. or B.P.) and spectroscopic methods (NMR‚ IR and MS). Method The mixture (sample number: 27) was dissolved in 200 mL of CH2Cl2 and then extracted with 10% NaOH. The acid was removed
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rest of the tests we had to work with other groups so that we could finish off the experiments. Other than some slight mishaps the whole of the experiment including the calculations everything when pretty smooth. Aspirin Synthesising and Purification History of Aspirin The compound‚ from which the active ingredient in Aspirin was first found in salicylic acid‚ was found in the bark of a willow tree in 1763 by Reverend Edmund Stone. The bark from the willow tree contains high levels of Salicin
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BIS 541 MANAGING INFORMATION SYSTEM TMA 1 Executive Summary The use of Information technology is important to build the strategic and operation management of airlines‚ and help to build the future airlines successfully. The emergence of the Internet in the mid1990s as well as the development of Intranets and Extranets forced airlines to refocus their strategy on technological innovations in order to enhance their competitiveness. (Buhalis 2004). AirAsia believes in the low fare business
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SWOT : AIR ASIA Strengths 1. low cost operation 2. target mass customers 3. efficiency workforce 4. Staffs have multi skill to do their job. 5. single type fleet to service the customer‚ it easies to maintenance. 6. lowest fare more than others. 7. Sell the ticket direct to the customer. Weakness 1. Limited service to the customer. 2. charge every things except the ticket 3. A lot of competitor. 4. Brand positioning lower than other brand. 5
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REFRIGERATION AND AIR CONDITIONING 1. DEFINATION OF REFRIGERATION Refrigeration is defined as “ the branch of science that deal with the process of reducing and maintaining the temperature of confined space or material below the temperature of surrounding” the system maintain at lower temperature is known as refrigerated system and equipment used to obtain this is known as refrigerator. The cooling effect produced by this equipment is the refrigerating effect. 2. PRINCIPLE OF REFRIGERATION
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and Air Pollution Analysis Houston‚ Texas holds around two million people‚ carrying hundreds of thousands of cars daily on these busy freeways. On top of the pollutants coming from vehicles we also have the industrial refineries that are located only 45 minutes from the heart of Houston. Most the smog comes from the Houston Ship channel With the combination of these two things we can see how polluted our city and waters are. One of the main problems in Houston is air pollution. The air pollution
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discussing the Clean Air Act of 1970 along with the amendments made in 1977 and 1990. I will discuss the law and some of the provisions that have been made. I will discuss the economic impact as a result of this law; if there are any fines‚ costs‚ or benefits economically along with data to support this information. I will also discuss my feelings on whether this law has been beneficial and also provide information to support my answer. Clean Air Act The Clean Air Act of 1970 is a federal
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for Air Pollution in Select U.S. Cities According to the Oxford Dictionary‚ air pollution is defined as‚ “the presence in‚ or introduction into‚ the air of a substance which has harmful or poisonous effects.” When an individual thinks of air pollution‚ chances are they typically imagine a dark smog hanging over an urban area‚ causing problems such as asthma and other respiratory problems for those who have no choice but to breathe in the air. However‚ there are several different types of air pollution
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Air Powered Car A compressed air car is a car that uses a motor powered by compressed air. The car can be powered solely by air‚ or combined (as in a hybrid electric vehicle) with gasoline‚ diesel‚ ethanol‚ or an electric plant with regenerative braking. History Compressed air has been used since the 19th century to power mine locomotives and trams in cities such as Paris (via a central‚ city-level‚ compressed air energy distribution system)‚ and was previously the basis of naval torpedo propulsion
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The Purity and Purification of Solids- Part 2- Recrystallization Courtney Percival CH 337 Laboratory‚ Section 037 Department of Chemistry Portland State University‚ Portland OR ABSTRACT INTRODUCTION Recrystallization is a commonly used tool in laboratories when dealing with impure solids. "An effective recrystallization is one in which 1) a high degree of purity is achieved as well as 2) a maximum recovery of sample".1 Solubility‚ the tendency of a substance to dissolve in a liquid‚ is an
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