Lab 5 Acid/Base Extractions Introduction The purpose of this experiment is to separate either the organic base (amine) or organic acid (carboxylic acid) from a mixture that contains inorganic impurities (salt) by performing a liquid-liquid extraction and then taking a melting point. Key Experimental Details and Observations Our starting material‚ Compound B‚ was a fine white powder and weighed 0.535g. The final product was a shiny white sheet that resembled acrylic paint and weighed 0.109g
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In the context of Jurisprudence‚ the Separation Thesis ideology‚ the view of Legal positivists‚ asserts that while legal and moral obligation are separate and there is no necessary connection between law and morals‚ legal and moral obligation sometimes overlap and it may be necessary to examine the standard of rules as it relates to our obligation to obey them‚ although‚ there is no rule to obey laws. 1 Contrary to the view of Legal positivists‚ the natural law theory denotes that rules of law are
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This essay will seek to analyse the doctrine of the separation of powers and the importance of its presence within a constitution. Particular emphasis will be placed on identifying how this idea is incorporated into the United Kingdom’s (UK) constitution and the effect that recent developments of constitutional reform such as the introduction of the UK Supreme Court in place of the House of Lords has had. The doctrine of the separation of powers is an idea that can be seen in writings as far back
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ICSE Class X Chapter 5 Hydrogen Chloride and Hydrochloric Acid Hydrogen chloride (HCl) : Formula : HCl Nature : Covalent. Molecular Mass : 36·5u [i.e. HCl = 1 + 35·5 = 36·5] Occurrence : (i) Present in gastric juices. (ii) Present in volcanic gases. Laboratory preparation of HCl gas : Hydrogen chloride gas is prepared in laboratory by heating conc. H2SO4 with NaCl. NaCl + H2SO4 Heat → NaCl + NaHSO4 Heat → NaHSO4 + HCl Sodium hydrogen sulphate Na2SO4 + HCl
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EXPERIMENTAL PROCEDURE: 1. 2.07 g of the mixture of naphthalene and benzoic acid was weighed accurately on a balance. The mixture was then dissolved in 40 ml dichloromethane and the solution was poured into a separatory funnel. 2. 20 ml of aqueous sodium bicarbonate solution was added to the dichloromethane. A stopper was placed on the separatory funnel and was shaken and pressure was frequently released. The 2 liquids separated into clear layers and the lower layer (dichloromethane layer) was
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How Acetylsalicylic Acid was Discovered Acetylsalicylic Acid in its earliest form was a powder for the bark and leaves of the willow tree. Hippocrates‚ who lived sometime between 460 B.C. and 377 B.C‚ founded it. This “Miracle Drug” that was able to relieve pains was later looked into with further detail by Johann Buchner. He isolated a tiny amount of bitter tasting yellow‚ need- like crystals‚ and called salicin. By 1829 French Chemist Henri Leroux had improved the extraction procedure to
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diseases. Its two main characteristics are uncontrolled growth of the cells in the human body and the ability of these cells to migrate from the original site and spread to distant sites. If the spread is not controlled‚ cancer can result in death. 2.How does cancer occur? The body is made up of trillions of living cells. These cells grow‚ divide‚ and die in an orderly fashion. This process is a tightly regulated one that is controlled by the DNA machinery within the cell. When a person is a baby
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Ecosystems Components SCI/256 A region that receives fewer than 10 inches of rain annually is considered a desert. This lack of precipitation loosely illustrates what encompasses the desert ecosystem. Although there are many cold deserts around the globe‚ for the purpose of analysis‚ the focus of this paper will be hot desert ecosystems. The extreme heat of the day in some deserts can reach above 120 degrees and drop down below 32 degrees (National Geographic‚ 1996-2013). These temperature extremes
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Separation anxiety disorder is a medical condition that is considered a distress when a person is away from some that they are attached to‚ or home. Separation anxiety disorder can dramatically affect a person’s life by limiting the ability to engage in ordinary activities. A person with a separation anxiety disorder often become extremely upset when forces to separate. According to the largest scientific and professional organization called the APA (American Psychological Association) stated that
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9.1 Manufacture of Sulphuric Acid 1. State uses of sulphuric acid in daily life. - lead acid batteries in automobiles and for home use - extraction of elements from ores - manufacturing of fertilizers 2.The following shows an incomplete flow chart of the Contact process. a) b)Chemical equation A. B. C. D. 3. Briefly explain the sources of sulphuric dioxide gas in atmosphere. -Sulphur dioxide is produced mainly from the combustion of fossil fuels
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