Extraction of iodine from kelp

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  • Created by: Saaamm
  • Created on: 27-03-14 14:38
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  • Extraction of iodine from kelp
    • Iodine was discovered in 1811.
      • Was extracted from kelp,which is obtained by burning seaweed.
        • Some iodine still produced in this way.
    • Salts such as sodium chloride,potassium chloride and potassium sulphate are removed from kelp by washing with water.
      • Residue is then heated with manganese dioxide and concentrated sulfuric acid, iodine is then liberated.
    • 2I- + MnO2 +4H+  -----> Mn2+ +2H2O +I2

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