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In the iodine clock reaction between persulphate ions and iodide ions.... watch

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    Why is sodium thiosulphate needed?

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    (Original post by SmileyGurl13)
    Why is sodium thiosulphate needed?

    Thanks
    Not the most amazing source but:
    http://en.wikipedia.org/wiki/Iodine_clock_reaction
 
 
 
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Updated: September 26, 2010
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