Friedel-Crafts Alkylation Reaction: Abstract This experiment demonstrates a synthesis of a 1,4-di-t-buytl-2,5-dimethoxybenzene by reacting 1,4-dimethoxybenzene with a tertiary-butyl alcohol with the presence of a Lewis acid, sulfuric acid (H2SO4), called a Friedel-Crafts mechanism. This reaction yield a product of 67.96% yield and a melting point starting at 103˚C and a complete melting point around 106˚C. Am HNMR spectrum revealed that the end product of 1,4-di-t-buytl-2,5-dimethoxybenzene
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CHEMISTRY 1031 (CHILDS) – STUDY GUIDE FOR EXAM II Tuesday October 14 BE 160 Exam II will cover the material I lectured on from chapters 4 and 5. You are also expected to retain material from chapters 1, 2, and 3. Everything covered in lecture is fair game for the exam. You will be provided with a periodic table, solubility rules, conversion factors and constants (similar to those at the back of the chapter.) The exam will contain a mixture of multiple choice questions similar to those
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Chemistry Acids and Bases I. Acids A. Definition Covalent molecular compound Ionizes in water Forms H+(aq) as the only cation B. Common acids Dil./ conc. HCl Very dil. HNO3 Dil. H2SO4 C. Basicity Number of H+(aq) produced per acid molecule Monobasic HCl, HNO3, CH3COOH Dibasic H2SO4, H2SO3 Tribasic H3PO4 Stepwise ionization for polybasic acids H2SO4 (aq) H+(aq) + HSO4-(aq) HSO4-(aq) H+(aq) + SO42-(aq) D. Physical
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The precipitation of the metal ion on the carrier can be achieved by heating. The carrier and the enzyme can be separated by decreasing the pH, since it is a reversible process, the matrix and the enzyme can be regenerated. This flow chart show the classsifcation
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environment and the current issues, research and developments in chemistry. 1.1 Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: • Acid reactions: o acid (aq) + base (aq) salt (aq) + water (l) o acid (aq) + active metal (s) salt (aq) + hydrogen (g) o acid (aq) + metal carbonate (s) salt (aq) + water (l) + carbon dioxide (g) • Cracking of long chain alkanes (e.g. decane) to give a shorter chain alkene & alkane o Thermal cracking (heated
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iron, but not by ferric citrate or ferric sequestrene which do not bind iron. The ionised iron content of iron-dextran is deduced. SYNOPSIS The lytic activity of iron-dextran is also inhibited by iron-dextrin and by an iron-sorbitol-citric acid preparation. It is suggested that the iron-sorbitol-citrate molecular complex contains free chelating groups for iron. The significance of these findings for iron-carbohydrate toxicity and metabolism is briefly discussed. The clinical toxicity
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Acid rain is precipitation that has elevated levels of hydrogen ions, causing a low pH level. The pH level of pure water has a pH of 7, which is neutral. A pH range of 6.5 to 8 is considered to be safe. This means that organisms are at very little to no harm from their surroundings. Acid rain is considered to have a pH level of 5.6. Acid rain is formed when wet and dry deposition mixes with the atmosphere. This deposition contains high amounts of sulfuric and nitric acids. Acid rain can come
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| |Sulfuric acid (H2SO4) |Strong mineral acid |Can cause burning, swelling, and tearing on any body parts | Note: Some pollutants may not have direct health effects. Choose one of the following atmospheric issues: air pollution, global warming, ozone depletion, and acid deposition. Then, respond to the following: • What air pollutants combine and contribute to this issue? Acid deposition has many different combinations
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How Does Acid Rain Influence on People’s Health? Acid Rain puts an effect on the ecosystem is a community of plants, animals and other organisms along with their environment including the air, water and soil. Everything in an ecosystem is connected. If something harms one part of an ecosystem – one species of plant or animal, the soil or the water – it can have an impact on everything else. What is Acid Rain? Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into
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| Acid Rain | .PrinceEcologyApril 3O, 2013 | | | Abstract Acid Rain is a mixture of wet deposition and dry deposition. Acid Rain is caused by a surplus of the chemicals sulfur dioxide and nitric oxide caused by air pollution. Air pollution comes from two main sources man made sources and natural sources. Man made sources come from combustion of coal used in power plants and exhaust pipes and natural
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