cobalt wong siu man (43) tong yuk choi(39) chan chun chung(25) law chung kwong(33)

Download Cobalt Wong Siu Man (43) Tong Yuk Choi(39) Chan Chun Chung(25) Law Chung Kwong(33)

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  • CobaltWong Siu Man (43)Tong Yuk Choi(39)Chan Chun Chung(25)Law Chung Kwong(33)

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  • Background Informationa chemical element with symbol Co and atomic number 27Melting point is 1495C , boiling point 2927CIt is found naturally only in chemically combined form.Hard, silver-gray metalPure cobalt is not found in nature, but compounds of cobalt are common

  • Testing waterCobalt chloride paper is paper soaked in cobalt(II) chloride (CoCl2) solution. It is used to test for the presence of water because it turns from blue to pink upon exposure to water.CoCl2 (blue) + 6 H2O [Co(H2O)6]Cl2 (pink)

  • AlloysCobalt-based super alloys consume most of the produced cobalt makes them very hard and wear resistant. The temperature stability of these alloys makes them suitable for use in aircraft engines

  • Cobalt GlassCobalt glass is a deep blue colored glass prepared by adding cobalt compounds to the molten glass. It is appreciated for its attractive color

  • Gamma ray sourceCobalt-60 is useful as a gamma ray source sterilization of medical supplies, medical waste and density measurements Cobalt-60 has a radioactive half-life about 5years. Cobalt-57 most often used in medical tests

  • Other usage of CobaltLithium cobalt oxide (LiCoO2) is widely used in lithium ion battery cathodesOther uses of cobalt are in electroplating , attractive appearance, hardness and resistance to oxidation

  • The End, Thank You