Introduction: The objective of this experiment is to become familiar with the methods of separating substances from one another using decantation‚ extraction‚ and sublimation techniques. Most materials in our surroundings are mixtures of two or more substances in which each substance retains its own chemical identity and therefore its own properties. Mixtures are either homogeneous or heterogeneous. Mixtures that don’t
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Separation of Mixtures 9/11/11 * Introduction: A compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Unlike a compound‚ a mixture is a material system made up by two or more different substances which are mixed together but are not combined chemically. There are two kinds of mixtures‚ homogeneous and heterogeneous. Homogeneous mixtures have the same composition and appearance throughout
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enumerated powers‚ reserved powers‚ and concurrent power. Enumerated powers are only powers for the National government. Reserved powers are powers only for the state government. Concurrent powers are powers for both state and national Government. This separation of powers was due to the people making sure that no one had more authority than others. This took away some responsibilities but it also gave states the chance deal with their needs the way that they wanted. The Enumerated powers belonged only
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DNA Extraction from Fruit 1. What was the purpose of adding liquid soap and salt in step #1 and how does NaCl contribute to maximum DNA extraction. The purpose of using soap was to destroy the membranes inside a kiwi cell. Soap helped with that because it dissolves the membranes easily. Salt or NaCl was used to remove proteins and carbohydrates. NaCl caused the proteins and carbohydrates to precipitate. 2. Why was it necessary to “mush” the kiwi by hand? If the step was omitted‚ what
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Title: Lab #3 Separation of a Mixture of Solids Purpose: To understand the different separation methods and techniques that depend on the chemical properties of a specific substance. Also to become more comfortable with performing those actions of separation so I have them in the future. For this experiment‚ I will separate a mixture of four distinct substances: sodium chloride‚ benzoic acid‚ silicon dioxide‚ and iron fillings into pure beings. Procedure: Materials: distilled water coffee
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Tan 1 DNA EXTRACTION Aim : To extract the DNA from an egg yolk using various enzymes and to compare with other groups the most effective way to extract DNA. Hypothesis : To be able to observe white springy substances after mixing with enzyme and alcohol. Apparatus : -Test tube‚ spatula‚ glass rod‚ dropper‚ beaker‚ test tube rack‚ skewer. Materials : - 1 egg‚ meat tenderizer‚ salt‚ water ‚ soap‚ isopropyl alcohol 91%‚ pineapple juice. Variables : Manipulated Variable : Responding
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Vol. 1 ACETIC ACID 115 ACETIC ACID 1. Introduction Acetic acid [64-19-7]‚ CH3COOH‚ is a corrosive organic acid having a sharp odor‚ burning taste‚ and pernicious blistering properties. It is found in ocean water‚ oilfield brines‚ rain‚ and at trace concentrations in many plant and animal liquids. It is central to all biological energy pathways. Fermentation of fruit and vegetable juices yields 2–12% acetic acid solutions‚ usually called vinegar (qv). Any sugar-containing sap or juice can
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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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is cultivated for its many uses. The plant is a large tree from 12 to 25 meters in height. The pods are oblong‚ thickened‚ and 6 to 15 centimetres by 2 to 3 centimeters‚ slightly compressed‚ and provided with a thin‚ crustaceous epicarp and a pulpy‚ acid‚ edible mesocarp. The young leaves flowers‚ leaves‚ and young pods are being used by people for seasoning foods like “sinigang”. The pulp surrounding the seeds‚ called “malasebo” is eaten outright either with or without salt (E. Quisumbing‚ 1951).
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Separation exists between society and the penal system‚ and due to this‚ there is a grave lack of knowledge of what is happening in prisons and how we can improve the situation we currently have in regards to the prison system. There are major flaws within the penal system‚ and Angela Davis highlighted a main one in secrecy. We know based off of research that our prison population commonly consists of individuals who struggle academically (Petersilia‚ 2003‚ pg 32). Because of this lack of strong
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