Unit _ - Control of Air Pollution FABRIC FILTER – It consists of a tabular bag which is closed at the upper end and has a happer attached at the lower end to collect particles when they are dislodged from the fabric. Many such bags are hanged in a bag house. The filter bags are cleaned occasionally by a mechanical shaker for efficient filtration. It has high efficiency and can filter 0.5 µm size particles. ELECTROSTATIC PRECIPITATOR – It works on the principle of electrostatic precipitation
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3.1 a) Valence electron: Valence electrons are the electron in the outermost electron shells of an atom. They are generally the electrons involved in chemical reactions and bonding with other atoms. b) Lewis electron: It is a structural demonstration of a molecule where you can use dots to show the position of the electron around the atoms and lines. c) Octet rule: It is referring to the principle that bonded atoms share their eight outer electrons. There rule of the octet is sometimes broken
Free Atom Electron Covalent bond
Assessment 1) Describe the difference between ionic and covalent bond. Ionic bonds have electrostatic forces that hold cations and anions together‚ and are electronic neutral. Covalent bonds are bonds that don’t give or take any electrons. In stead they share the elctrons 50) Which of these compounds contain elements that do not follow the octet rule? Explain. a) NF3: 5 + (7*3) = 26 b) PCl2F3: 5 + (7*2) + (7*3) = 40 c) SF4: 6 + (7 *4) = 24 d) SCl2: 6 + (7*2) = 20 The answer is “d”
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Company #1: Neils Bohr Equation: 3Na2CO3 + 2AlPO4 = 2Na3PO4 + Al2(CO3)3 Reaction: Double Displacement Company #2: Hello Equation: C5H12 + 8O2 = 5CO2 + 6H2O Reaction: Combustion Company #1 Neils Bohr 3Na2CO3
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FORM 4G ELECTROLYSIS WORKSHEET TERM 3 2010-2011 1.Figure 1 below is a diagram of the apparatus used in the electrolysis of fused sodium bromide. Figure 1 a)Write the formulae for the ions present in the fused sodium bromide. b)Write an ionic equation to represent the reaction taking place at the positive and negative electrodes. c)When the heat source was removed‚ the crucible cooled and the lamp went out. Explain why the lamp went out when the crucible cooled. d)At the end of the experiment
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Procedure Access the virtual lab and complete the experiments. Part One (Flame Test): 1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame: Barium-green Calcium-red Sodium-yellow Rubidium-purple Potassium-blue Lithium-pink 2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.: Unknown 1-yellow. I think it is Sodium because
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BENIFICIAL AND ALTERNATIVELY NOT SO BENIFICAL USES OF RADIATION BY: Sanwal Hayat What is radiation? Radiation is away in which energy moves from one place to another for example energy radiates away when a stone dropped in the water in circular waves while sound energy radiates from speakers mouth to listeners ear and heat energy radiates from sun to earth.
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E Name: 1. XPERIMENT 9 IODIMETRIC TITRATION OF VITAMIN C Section: Pre-Laboratory Answer the following questions before coming to the laboratory. Give the reason for the following; Iodimetric titrations are usually performed in neutral or mildly alkaline (pH 8) to weakly acid solution. 2. Iodine solutions are prepared by dissolving I2 in a concentrated solution of potassium iodide. 3. Iodimetric determination of vitamin C is performed rapidly after preparing vitamin C solution
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Part One (Flame Test): 1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame SOLUTION | NAME | COLOR | KNOWN 1 | BARIUM | GREEN | KNOWN 2 | CALCIUM | RED | KNOWN 3 | SODIUM | ORANGE | KNOWN 4 | RUBIDIUM | PURPLE | KNOWN 5 | POTASSIUM | BLUE | KNOWN 6 | LITHIUM | VIOLET | UNKNOWN 1 | SODIUM | ORANGE | UNKNOWN 2 | POTASSIUM | BLUE | 1. Identify each unknown
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Test #3 Chapter 2: 1) What is matter? 2) What is mass? 3) Matter that has a uniform and definite composition is called a ______. Give an example. 4) A quality/condition of a substance that can be observed/measured without changing the substance is a ________ __________. Give examples. 5) What are the three states of matter? Put the correct state of matter in each box. 6) What is the difference between gas and vapor? 7) What is a physical change? Give an example. 8) A physical blend
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