1. Tardigrade
  2. Question
  3. Chemistry
  4. Thiosulphate reacts differently with iodine and bromine in the reactions given below: 2S2O2-3 + I2 → S4O2-6 + 2I- S2O32- + 2Br2 + 5H2O → 2SO2-4 + 2Br- + 10H+ Which of the following statements justifies the above dual behaviour of thiosulphate?

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Q. Thiosulphate reacts differently with iodine and bromine in the reactions given below:
$2S_{2}O^{2-}_{3} + I_{2} \to S_{4}O^{2-}_{6} + 2I^{-}$
$S_{2}O_{3}^{2-} + 2Br_{2} + 5H_{2}O \to 2SO^{2-}_{4} + 2Br^{-} + 10H^{+} $
Which of the following statements justifies the above dual behaviour of thiosulphate?

Redox Reactions

Solution:

$Br_2$ oxidises $S$ to a higher oxidation state image and $I_2$ oxidises $S$ to a lower oxidation state image. Thus, $Br_2$ is stronger oxidising agent than $I_2$.