how I2 (iodine) is extracted from its aqueous solution?
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Explanation:
The free iodine in the acidified brine solution is captured with activated carbon and neutralized with ammonia. The iodine is extracted from the activated carbon using hot caustic soda, which produces an iodate-iodide mixture. This solution is acidified with sulfuric acid and the iodine is separated by filtration.
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