with water to form several hydrates. The concentrated acid‚ therefore‚ acts as an efficient drying agent‚ taking up moisture from the air and even abstracting the elements of water from such compounds as sugar and starch. The concentrated acid also acts as a strong oxidizing agent. It reacts with most metals upon heating to produce sulfur dioxide. (McGraw-hill science and Technology encyclopedia) (http://www.answers.com/topic/sulfuric-acid#ixzz1oDQ9MJCN) If a person is exposed to the fumes‚ it
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CASE STUDY 1: Xstrata Produced Acidic Oxide – SULFUR DIOXIDE Industrial Process – Sulfur Dioxide is an acidic oxide produced domestically and industrially in many ways. Xstrata‚ particularly Mount Isa Mines LTD‚ produces sulfur dioxide as a by-product from the extraction of copper from ores. Copper ore mined in Australia is predominantly chalcopyrite (CuFeS2)‚ a sulfide ore of copper. The extraction of copper begins with crushing the ore and subjecting the crushed ore to froth floatation. In
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mixture of iron filings and water .................. (e) zinc sulfate crystals from aqueous zinc sulfate .................. (f) hexane from a mixture of the liquids‚ hexane and octane .................. [1] [1] [1] [1] [1] [1] [Total: 6] 2 Selenium and sulfur are in Group VI. They have similar properties. (a) One of the main uses of selenium is in photoelectric cells. These cells can change light into electrical energy. (i) Name a process which can change light into chemical energy.
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Diploma in Chemical and Pharmaceutical Technology (CLDF02) Nanyang Polytechnic Plant-based Project (PbP) Report Industrial Attachment at ExxonMobil Asia Pacific Private Limited [13th October 2008 – 13th February 2009] Name of Student : Ong Wei Suan Admin. Number : 062015X Module Group : CPT0605-B1 Name of Company : ExxonMobil Asia Pacific Private Limited Department : ExxonMobil S1 Operations Supervisor-in-charge : Mr Vignesvaran Swaminathar Liaison
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include: • Sulphur oxides (SOx) - especially sulphur dioxide‚ a chemical compound with the formula SO2. SO2 is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulphur compounds‚ their combustion generates sulfur dioxide. Further oxidation of SO2‚ usually in the presence of a catalyst such as NO2‚ forms H2SO4‚ and thus acid rain.[2] This is one of the causes for concern over the environmental impact of the use of these fuels as power sources. • Nitrogen oxides
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Rare Earth Elements in the United States Recently‚ international events have brought attentions to the rare-earth elements. Issues surrounding China’s embargo on rare-earth elements exports have raised major concerns among the heavy buying countries around the world that rely on these resources. China currently dominates the global rare-earth production and exports of the international marketstrade. Devastating impacts may arise if China places a long-term embargo on its rare-earth elements export
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Hydrochloric Acid Rate Laws Introduction The purpose of this demonstration is to investigate the effect of sodium thiosulfate concentration on the rate of reaction of sodium thiosulfate with hydrochloric acid. The reaction‚ which produces solid sulfur‚ will be followed by measuring the time needed for the reaction mixture to become opaque. The results will be analyzed graphically to determine the order of reaction— the mathematical relationship between the reactant concentration and the rate.
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silver-white chemical element discovered in 1886 by a French scientist named Paul-Émile Lecoq de Boisbaudran. It wasn’t isolated until a different separation technique (ion-exchange) developed in the 1950s by a Canadian scientist Frank Spedding and his team. This rare element it is never naturally found. It is only made chemically. It can be found in minerals such as xenotime. Dysprosium is a member to the lanthanide family on the periodic table just like all the other rare elements. Shown in Fig.1 is
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Environmental Chemistry Assignment 3: Acidity in natural water may be caused by several factors. Describe these factors and explain how they contribute to the acidity of water. The acidity in natural water can be caused by the bedrock and soil composition of the area around the stream. This factor can be considered as one of the most important factor that influence the pH of the water. Soils contain calcium‚ limestone and a layer of sand or gravel with a granite base. The calcium and limestone
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MONOLOGUE FOR AN ONION: AN ANALYSIS Cutting an onion breaks cells in its skin causing a reaction that results to the formation of volatile sulfur compound which‚ when mixed with tears coating our eyes‚ becomes sulfuric acid. This triggers the tear ducts to produce more tears to alleviate the imbalance in acidity the irritant has caused; the longer the eyes are exposed to the acid the greater the quantity of tears produced. Sue Kwock Kim uses this certain property of an onion to tackle a specific
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