5 H2S (g) + 2 HIO3 (aq) → I2 (s) + 5 S (s) + 6 H2O (l)
This is an oxidation-reduction (redox) reaction:
5 S-II - 10 e- → 5 S0 (oxidation)
2 IV + 10 e- → 2 I0 (reduction)
H2S is a reducing agent, HIO3 is an oxidizing agent.
Reactants:
- H2S – Hydrogen sulfide
- Other names: D , Ihydrogen monosulfide|Dihydrogen sulfide|Sewer gas|Sulfane|Sulfurated hydrogen|Sulfureted hydrogen|Sulfuretted hydrogen|Sulfur hydride|Hydrosulfuric acid|Hydrothionic acid|Thiohydroxic acid|Sulfhydric acid}} , Hydrosulfuric acid
- Appearance: Colorless gas ; Colourless compressed liquefied gas with characteristic odour of rotten eggs ; Colorless gas with a strong odor of rotten eggs. [Note: Sense of smell becomes rapidly fatigued & can NOT be relied upon to warn of the continuous presence of H2S. Shipped as a liquefied compressed gas.]
- HIO3
Products: