"Aluminium oxide" Essays and Research Papers

oxygen to form a layer magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper to remove this layer so that the underlying metal can be exposed into air. Question 2: Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water

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Title: Investigating the Properties of Period 3 Oxides Aim: To examine the oxides of Period 3 elements and describe their structure and bonding. Introduction: Generally‚ there are oxides of metals and non-metals. Metals burn in oxygen to form basic oxides while non-metals form acidic oxides. Structurally‚ they are covalent or ionic compounds. You are to do some simple observations and tests‚ to find out the differences between the types of oxides provided and to account for these differences

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Chemistry: Research task 1 5.1- define the terms mineral and ore with reference to economic and non-economic deposits of natural resources The term ‘ore minerals’ is commonly referred to as economic minerals Mineral: naturally occurring compounds. Rocks are mixtures of various minerals. Most minerals are lattice structures‚ both ionic and covalent. Economic minerals have been divided into two main categories: Metalliferous minerals- mined to extract a metal Industrial mineral- either has

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monoxide * dioxide vii) A mixture of Aluminium nitrate and Aluminium powder is called: * Duralumin * Ammonal * Carnallite * Alum viii) Ca2B6O11.5H2O is the chemical formula of: * Cryolite * Colemanite * Bauxite * Borax ix) The formula of Hypochlorous acid is: * HOCl * HClO2 * HClO3 * HClO4 x) The metal ion having the highest number of unpaired electrons is: * Mn2 * Fe2 * Co2 * Ni2 xi) The chemical name of laughing gas is: * Nitric oxide * Nitrous oxide * Nitrogen trioxide * Nitrogen pentoxide

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References: - ContinuedSchwarz‚ H.-G.‚ Briem‚ S.‚ Zapp‚ P. (2000): Future carbon dioxide emissions in the global flow ofprimary aluminium‚ Energy (forthcoming). SUSDEV 21 Executive Summary. Online from http://www.info.gov.hk/planningUllmann ’s Encyclopaedia of Industrial Chemistry (1985): Aluminium‚ Vol. A1‚ pp.459-480. World Comission on Environment and Development‚1987. Our common future‚ Oxford Univ. Press‚Oxford. World Resources Institute. World resources.

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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education .c rs om *2925136620* CHEMISTRY Paper 3 (Extended) 0620/33 May/June 2012 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams‚ graphs

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Abundance and Extraction of Metals 1.   a Mineral - A mineral is a naturally occurring inorganic solid‚ with a definite chemical composition‚ and an ordered atomic arrangement. b Ore - Deposit in the Earth of valuable metals contained in minerals. c Economic Natural Resource Deposit - This is a natural deposit of something that is economically viable to mine‚ refine and sell. Hence the deposit must be big enough to last for a large period of time‚ so that it will make enough money for the

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viable for a business to mine at a particular site. However‚ due to environmental damage and global warming‚ recycling has increased globally to create a sustainable future. By examining the cost and energy expenditure of recycling and extracting aluminium we can understand why recycling is a better choice than extracting metal from its ore. Discuss the importance of predicting yield in the identification‚ mining and extraction of commercial ore deposits Yield is the amount of product obtained

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EXTRACTION OF COPPER FROM OXIDISED COPPER ORE Aim: To analyse how copper is obtained from oxidised copper ore using the processes of leaching‚ solid-liquid separation‚ displacing and electrowinning. Method: Refer to ‘Extraction of Copper from oxidised Copper Ore’ document pages 1-2 Results: Leaching: The blue particles in the copper ore which is copper was dissolved in the sulphuric acid and the solution turned into a blue colour. There was also sediment that was floating around

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CHEMISTRY REVISION GUIDE for IGCSE Coordinated Science This revision guide is designed to help you study for the chemistry part of the IGCSE Coordinated Science course. The guide contains everything that the syllabus says you need you need to know‚ and nothing extra. The material that is only covered in the supplementary part of the course (which can be ignored by core candidates) is highlighted in dashed boxes: Some very useful websites to help you further your understanding include: •http://www

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