skills of recrystallisation using normal filtration and reinforce the technique of the melting point determination. The method used to synthesize aspirin was esterification by reacting salicylic acid with acetic anhydride with the presence of dehydrating agent‚ conc. sulphuric acid‚ to speed up the reaction. Having obtained the crude aspirin which was still impure‚ recrystallisation was conducted to remove the impurities. The aspirin harvested at the end of the experiment was 1.19g with the percentage
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Affect of Urbanization on Climate Throughout history man has always tried to find ways to make facilitate survival. Be that of inventing weapons or inventing the internal combustion engine‚ man has learned to adapt to the environment and use its resources in order to reduce the arduous task of surviving. Yet with all these inventions the one thing man has not learned to control is nature itself. Although one may try to manipulate it‚ it is in fact nature who is manipulating mankind. For it is shown
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Communications Overview Advertising Dr Brenda Murphy What is Advertising? Advertising is 2 things: 1. It has traditionally been a means by which we sell goods‚ services‚ and corporate identity. In recent years however it has become even more sophisticated and now is also used to sell image‚ ideas and ideals. 2. 3. It is also a cultural phenomena - it is a way of tracking and tracing societies developments both economically‚ politically‚ socially and culturally. 4. A brief historical
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Woodlice Investigation Introduction: The ecological niche of the woodlice Porcellio scaber. The woodlouse Porcellio scaber is native to Europe but also commonly found in New Zealand. They live in cool‚ dark‚ damp microhabitats such as in rotting wood‚ under rocks‚ in caves and leaf litter. Small insectivorous rodents and birds as well as some spiders feed on woodlice. In the rotting log from which I gathered my specimens there were also millipedes‚ crickets‚ weta and spiders living. Woodlice
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8 Reasons Why People Drink Soda & 16 Reasons To Give Up Soda Drinking [pic] Most of us drink soda. Some drink more than others. And probably many regular soda drinkers are aware that soft drinks are bad for the health. At the same time‚ United States ranks first among countries in soft drink consumption. I think we need to know more about this drink that we love so much. And so here are 8 reasons why we drink soda: 1It’s Very Tasty! The taste could be one thing that gets us addicted to drinking soda
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common disorders of the digestive system. It is usually a disorder of the large intestine (colon)‚ although other parts of the intestinal tract‚ even up to the stomach can be affected. The main functions of the colon include the absorption of water‚ dehydrating the contents to create a soft well-formed stool; and then movement of that stool to the point where it can evacuated from the body (Ross and Wilson 1990). This movement occurs by rhythmic contractions of the colon. When IBS occurs‚ the colon
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Department of Chemical Engineering‚ IIT Delhi POLYIMIDE SUBMITTED TO: Dr. Sreedevi Upadhyayula SUBMITTED BY: Gurdeep Singh Somal 2010CH10078 Gurvineet Singh Dhillon 2010CH10079 Gaurav Singh Sinsinwar 2010Ch10077 Polyimide is a polymer of imide monomers. The structure of imide is as shown. Polyimides have been in mass production since 1955. Typical monomers include pyromellitic dianhydride and 4‚4 ’-oxydianiline. Polyimides are a very interesting group of incredibly strong and astoundingly
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Chapter-5 SURFACE CHEMISTRY The branch of the Chemistry wich deals with the study of surface phenomena is called surface Chemistry. POINTS TO BE REMEMBERED: --1. Adsorption: - The accumulation of molecules species at the surface rather in the bulk of a solid or liquid is termed adsorption. 2. Desorption:-Removal of adsorbate from the surface of adsorbent is known as Desorption. 3. Sorption:-When adsorption and absorption both takes place simultaneously. 4. Type of adsorption: - On the basis of interaction
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Synthesis of Banana Flavor CHEMISTRY 200L EXPT 02 PAGE 01 - 11 Gerome B. Vallejos*‚ Ellis Mika C. Trino‚ Jahn Camille B. Valdez‚ Ariza Yamashita Department of Biological Sciences‚ College of Science Group 11 Corresponding author: gerome_911@yahoo.com Abstract The purpose of this experiment was to synthesize isopentyl acetate via Fischer esterification reaction between acetic anhydride and isoamyl alcohol‚ using concentrated sulfuric acid as a catalyst. This reaction is characterized by the combining
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The Power of Vital. Undoubtedly‚ the most important component to human health and vitality of oxygen. In fact‚ human life would not be possible without it: oxygen produces ATP (adenosine triphosphate) and within ATP our bodies would immediately shut down. When a person breathes‚ there is an exchange of carbon dioxide and oxygen. The oxygen‚ which is taken in by the body from the atmosphere around us‚ is picked up by the hemoglobin in the blood and distributed to all of the body’s trillions of
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