Empirical Formula of Magnesium Oxide Date: Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide. Equipment: · Balance · Crucible and lid · Bunsen burner · Magnesium ribbon (0.2g) · Steel wool · Crucible tongs · Pipe clay triangle · Tripod Procedure: 1. Obtain a clean‚ dry crucible and lid‚ then heat them for approximately 5 minutes over a Bunsen burner 2. Clean the surface of a 20 cm strip of magnesium ribbon using steel wool 3. Coil
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test the law of definite proportions for the synthesis reaction of combusting magnesium. In this lab‚ the polished magnesium ribbon was placed in covered crucible and was heated in order for it to react with Oxygen presented in air and in water provided. The result showed that Magnesium oxide formed through chemical reaction was made up of 60.19% magnesium and 39.81% oxygen‚ which is approximate proportion of both particles in every Magnesium oxide compound. From this lab it can be concluded that
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Extrusion is the process by which a block/billet of metal is reduced in cross section by forcing it to flow through a die orifice under high pressure. • In general‚ extrusion is used to produce cylindrical bars or hollow tubes or for the starting stock for drawn rod‚ cold extrusion or forged products. • Most metals are hot extruded due to large amount of forces required in extrusion. Complex shape can be extruded from the more readily extrudable metals such as aluminium. * The products obtained are also
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NO3-(aq)+Na+(aq) • Al(NO3)2 (aq)+NH4OH(aq) →Al(NH4)6+ (s)+ NO3-(aq)+Na+(aq) • Mn(NO3)2 (aq)+NaOH(aq) →Mn(OH)2(s)+ NO3-(aq) +Na+(aq) • Pb(NO3)2 (aq)+H2S(aq)↔PbS2(s)+ S2-2(g)+NO3-(aq) • Ag(NO3) (aq)+H2S(aq)↔ AgS2(s)+ S2-2(g)+NO3-(aq) • Ba(NO3) (aq)+H2S(aq)↔No reaction existed • Fe(NO3)2(aq)+H2S(aq)↔ Fe2S3(s)+ S2-2(g)+NO3-(aq) • Cu(NO3)2(aq)+H2S(aq)↔ CuS(s)+ S2-2(g)+NO3-(aq) • Ni(NO3)2(aq)+H2S(aq)↔NiS(s)+ S2-2(g)+NO3-(aq) • Mn(NO3)2(aq)+H2S(aq)↔MnS(s)+ S2-2(g)+NO3-(g) • Fe(OH)3(s)+HNO3(aq)↔Fe+3(aq)+ NO3-(g)+ H2O(l)
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Chemical Periodicity Engr. Imelda Galera De La Salle University-Dasmariñas Dasmariñas‚ Cavite Philippines ABSTRACT Chemical periodicity was demonstrated using different samples of elements from Group IA‚ IIA and IVA. These samples are: Li2CO3‚ Na2CO3‚ K2CO3‚ MgCO3‚ CaCO3‚ BaCO3‚ Carbon‚ Tin‚ Silicon and Lead. Each sample was placed in a test tube‚ (one sample and one test tube) and the physical color‚ appearance and state was defined. Water was used to test the solubility of the element
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Chemicals of Life • With the exception of water‚ virtually all chemicals of life are CARBON based • Molecules that contain Carbon are considered organic with some exceptions such as CO2 • Carbon has 4 valence electrons so it is oriented in a tetrahedron shape Sketch→ • Carbon can form up to 4 covalent bonds and can form long chains‚ rings‚ and branched chain molecules • Carbon acts as the backbone of biological molecules • Molecules that only contain carbon and hydrogen are known as hydrocarbons→
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Scrap Metal To Inform To inform my audience that scrap is a commodity often confused with waste. Scrap has monetary value making up one of the largest exports of the United States. Introduction I. Scrap is a $65 billion dollar industry in the United States. The U.S exports $15.7 billion to other countries. II. While this is a global industry it all starts with local entrepreneurs like me. III. Scrap is everything that we throw away that can be recycled and used to make new products.
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Chemicals should satisfy the following characteristics: if it’s safe to use‚ easily found in a market‚ and if it’s in a powder or liquid format so that different concentrated solutions can be used for tests. Aluminate Sulfate (Alum)‚ salt‚ and white vinegar satisfy these and are the chemicals that will be used. The different concentration of the Alum solution (Alum dissolved in water) as well as
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Kinetics Kinetics 6.1 Rates of reaction 6.2 Collision theory 6 16.1 Rate Expression (AHL) 16.2 Reaction mechanism (AHL) 16.3 Activation energy (AHL) 6.1 Rates of reaction 6.1.1 Define the term rate of reaction. 6.1.2 Describe suitable experimental procedures for measuring rates of reactions. 6.1.3 Analyse data from rate experiments. © IBO 2007 Figure 601 An explosion is a quick reaction D ifferent chemical reactions occur at different rates (i.e. speeds)
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Investigating The Rate Of Reaction Between Marble Chips And Hydrochloric Acid Planning I will use marble chips and different concentrations of hydrochloric acid and water to see how it affects the rate of reaction. I will use concentrations of 50cm3 using different volumes of water and acid. Introduction I am investigating how the rate of reaction between marble chips and hydrochloric acid is altered when the concentration is changed. This is the word equation for my investigation
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