Frequently Asked Questions (PAPER 6) 1) What is the purpose of ice or cold water? To cool down the gas so that it condenses and turns into a liquid. 2) when the gas collecting tube is upside down, give a property of this gas. It is less dense than air. 3) Why is a pencil used in drawing the origin line in chromatography? If pen was used, it will dissolve giving colors and so, the experiment won't be accurate. 4) When using ethanol, give a better apparatus arrangement, and why? Cover apparatus
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Synthesis of Acetanilide and Purification by Recrystallization Par, B., Ramos, S., Reynaldo, H., Roque, P., Servidad, Y., and Soriente, P. 2D-Pharmacy, Group No. 7, Department of Pharmacy, Faculty of Pharmacy, University of Santo Tomas, España Boulevard, 1015 Manila, Philippines Abstract Recrystallization is the primary method of purification used to isolate organic compounds in a supersaturated solution by the difference of solubility at different temperature that results to the
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Table of Contents 1. PAKISTAN STATE OIL (PSO) ..................................................................................................................3 1.1 Introduction .............................................................................................................................................3 1.2 History . .....................................................................................................................................................3 1.3 Their
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Chemistry Revision Hazard Symbols States of Matter As heat is added to a solid the particles start to vibrate more and more vigorously. Eventually when it reaches its melting point the particles have enough energy to break their bonds and melt into a liquid. As it is cooled energy is taken away so the particles vibrate less and if a liquid or gas the bonds become stronger and so it freezes or condenses. In the case of a solid it becomes less flexible. Particles in a solid vibrate around
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Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12
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Research Paper HUMN 432 - Society, Culture and Technology Ethanol in Brazil Team A I. Introduction 3 II. Brazil 4 a. Short history 4 b. Brazil during the oil crisis in the 70’s 6 III. Ethanol as bio-fuel 7 a. Extraction process 7 b. Energetically self sufficient ethanol plants in Brazil 8 c. Energy from Ethanol 9 d. Flex-Fuel Vehicles 10 IV. Economic Effects of Ethanol as Bio-Fuel 10 a. Brazil not endangered by a new oil crisis 10 b. Export 12 c. Vertical industries
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Question bank 1 mark questions 1. What is the valence shell electronic configuration of p-block elements ? Valence shell electronic configuration is ns2np1-6 2. What is Chile salt petre?/ Indian salt Petre ? Chile saltpeter is NaNO3(sodium nitrate) and Indian salt petre is KNO3(postassium nitrate) 3. What is fluorapatite ? The formula of fluorapatite is Ca9(PO4)6.CaF2. It is a mineral of phosphorous 4. What is the covalence of nitrogen in N2O5? 4 5. What is the basicity
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ENERGY TECHNOLOGY S.JITENDRA PAL Department of Chemical Engineering National Institute of Technology Karnataka Surathkal-Karnataka. Assistant Professor Fundamentals of energy and its impact on society and the environment. What is energy? • Energy :defined as the ability or capacity to do work. Energy is measured in BTU (British Thermal Unit) or Joule • According to Max Planck, energy is defined as the ability of a system to cause external action. • The term energy carrier – thus a carrier
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NATIONAL QUALIFICATIONS CURRICULUM SUPPORT Chemistry A Practical Guide Support Materials [REVISED ADVANCED HIGHER] [pic] The Scottish Qualifications Authority regularly reviews the arrangements for National Qualifications. Users of all NQ support materials, whether published by Education Scotland or others, are reminded that it is their responsibility to check that the support materials correspond to the requirements of the current arrangements.
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GCE Chemistry B (Salters) Unit F331: Chemistry for Life Advanced Subsidiary GCE Mark Scheme for June 2014 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing a wide range of qualifications to meet the needs of candidates of all ages and abilities. OCR qualifications include AS/A Levels, Diplomas, GCSEs, Cambridge Nationals, Cambridge Technicals, Functional Skills, Key Skills, Entry Level qualifications, NVQs and vocational
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