5 H2SO + 2 KI → 4 H2S + I2 + K2SO4 + H2O
This is an oxidation-reduction (redox) reaction:
4 S0 + 8 e- → 4 S-II (reduction)
S0 - 6 e- → SVI (oxidation)
2 I-I - 2 e- → 2 I0 (oxidation)
H2SO is an oxidizing agent, H2SO is a reducing agent, KI is a reducing agent.
Reactants:
- H2SO
- KI
Products:
- 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.]
- I2
- K2SO4
- H2O – Water, oxidane