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Iodine reacts with sodium thiosoulfate i...

Iodine reacts with sodium thiosoulfate in a neutral medium .Write the balanced equation of this reaction . Calculate equivalent mass of sodium thlosulfate in this reaction . (Assume molecule mass of sodium thiosulfate=M).

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`2S_(2)O_(3)^(2-)+I_(2)S_(4)O_(6-)^(2-)+2I^(-)` Equivalent mass +M.
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