The production and manufacture of Aspirin Aspirin is one of the most consumed painkillers created up to this date due to its reliability and low expense. It is often used to relieve minor aches and pains, reduce fever and as an anti-inflammatory medication. Due to its wide range of uses, the demand for this pharmaceutical is very high. As a result, manufacturers who produce this drug must be efficient in order to reduce the time taken to produce this drug and produce the in very high quantities
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[pic] FHSB 1214 BIOLOGY 1 FOUNDATION IN SCIENCE [pic] |Name |Chai Che Hoe | |Group member |Lim Chen Ye | | |Liow Yi Sheng | |
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of physical and chemical changes and to be able to distinguish between the two. Procedure: I placed 4 drops of each chemical listed in wells A1-B2. Wells A2 and B1 have two observations as they had two chemical reactions. When a chemical mixture did in fact produce a chemical reaction, I listed it in the “Chemical change (Y/N)” column and all other observations can be found in the “Observations” column. Data Tables: Exercise #1: |Well |Chemical #1 |Chemical #2
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writing net ionic equations for aqueous reactions in general chemistry. Knowledge of the solubility rules is necessary to complete this tutorial. A list of solubility rules is provided at the end of the tutorial for review. Net ionic equations are necessary in chemistry for several reasons: 1. They show only those species undergoing chemical change – “spectator” ions are removed. 2. They must be used in any equilibrium calculation. 3. They allow chemical reactions to be combined properly. 4. Used
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Introduction The transition metal catalyzed cross-coupling reactions such as Negishi,1 Heck,2 Suzuki-Miyaura,3 Stille,4 Kumada,5 Hiyama,6 and Sonogashira7 are extremely powerful tools for making C−C bonds. These methods have been extensively used in wide range of academic areas including material product synthesis, materials science, medicinal, biological, supramolecular chemistry, catalysis and coordination chemistry. Some of these reactions are also useful in pharmaceutical, agrochemical and fine
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Lemon Battery Grade Level: 6 Strand: Energy and Control Topic: Transforming electrical energy into light Overall Expectations: design and construct a variety of electrical circuits and investigate ways in which electrical energy is transformed into other forms of energy Specific Expectations: investigate ways in which electrical energy can be transformed into other forms of energy (e.g., into light) Materials Needed: • 3 lemons • 3 shiny copper coins • 3 zinc plated screws
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Classifying Synthesized Chemical Reactions Abstract During the experimentation, physical and chemical properties of unaltered elements/compounds were noted. The alteration of these physical and chemical properties, were understood to have defined chemical change. The experimental procedures were divided into five phases: Magnesium and Oxygen, Zinc and Copper(II) Sulfate, Metals and HCl, Reactions of Ionic Compounds, and the Sodium Carbonate and HCl. Different Reactions were noted for each respective
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that are protein. They speed up the rate of chemical reactions and metabolism in the body of organisms. They are specific in their action that means a certain enzyme will only speed up a certain reaction involving a specific substrate to bring about a specific product. Enzymes work on a key and lock mechanism where substrates are linked to their active sites. Enzymes reduce the activation energy required for reactions thus ensuring that reactions are more efficient in the sense that they use the least
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hydrochloric acid. To get the result use some related materials and thermometer to measure the temperature of each solution. The formula to describe this mixture reaction is HCl + NaOH → NaCl + H2O (Sodium hydroxide combined with Hydrochloric acid) Purpose To determine the molar enthalpy change of neutralization, for the reaction of aqueous sodium hydroxide and aqueous hydrochloric acid. Hypothesis If Hess’ law is used to calculate the molar enthalpy of combined for HCl and NaOH using experimentally
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Introduction A Diels-Alder reaction is a reaction in which a conjugated diene bonds with an alkane to produce a cyclohexane molecule. This reaction works best with dienes that are electron rich and dienophiles that are electron poor. For this experiment, our dicyclopentadiene is the diene and the maleic acid is our dienophile. In a Diels-Alder reaction, sigma bonds are formed from pi bonds. For this particular experiment, cyclopentadiene and maleic anhydride react via Diels-Alder in order to
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