Sunday, February 13, 2011

Chemical Assignment by Hu Zhanpeng 2P311

Chlorine dioxide is a chemical compound with the formula ClO2. This yellowish-green gas crystallizes as orange crystals at −59 °C. As one of several oxides of chlorine, it is a potent and useful oxidizing agent used in water treatment and in bleaching. It is also a highly endothermic compound that can decompose extremely violently when separated from diluting substances. As a result, preparation methods that involve producing solutions of it without going through a gas phase stage are often preferred. Arranging handling in a safe manner is essential. A commercially more important production route uses methanol as the reducing agent and sulfuric acid for the acidity. Two advantages by not using the chloride-based processes are that the co-production of elemental chlorine can be prevented, and that sodium sulfate, a valuable chemical for the pulp mill, is a side-product. These methanol-based processes provide high efficiency and can be made safe.
       So here is the Dot & Cross diagram for Chlorine Dioxide:

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