Chemistry: Contact Process And Sulfuric Acid

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Thiyasha Seilman 10E Science Mr. Rathod 15th September 2015 Word Count – 965 Words Contact Process & Sulfuric Acid Sulfuric Acid (H2SO4) is a colorless liquid that is used to make chemicals like hydrochloric acid, nitric acid, and sulfate salts. It is also used in the production of washing detergents, dyes, explosives, and drugs. It is also used to refine gasoline and other petroleum products. Sulfuric acid is also used in cleaning metals, like iron and steel. There are two different processes to create sulfuric acid, one is called the lead chamber process and the other is called contact process. The lead chamber process is significantly older between the two, and is used to produce most of the acid that fertilizers are made with. The lead chamber process also produces acid that is quite diluted. The contact process produces a significantly concentrated acid, and requires raw materials and the use of expensive catalysts. (Sulfuric Acid, The Columbia Encyclopedia). Contact Process produces sulfur dioxide, it also converts the sulfur dioxide into sulfur trioxide; this is a reversible reaction that happens during the middle of the conversion, and then it also converts the sulfur trioxide into sulfuric acid. The production of sulfur dioxide on an industrial scale requires the combination of sulfur and oxygen. S + O2 → SO2 This produces sulfur dioxide. Another way is to heat sulphide ores such as pyrite, and this should be done in an excess of air. For example, 4FeS2 +

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