8 FeCl3 + H2S + 4 H2O → 8 FeCl2 + H2SO4 + 8 HCl
This is an oxidation-reduction (redox) reaction:
S-II - 8 e- → SVI (oxidation)
8 FeIII + 8 e- → 8 FeII (reduction)
H2S is a reducing agent, FeCl3 is an oxidizing agent.
Reactants:
- FeCl3 – Iron(III) chloride , Iron trichloride
- 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.]
- H2O – Water, oxidane
Products:
- FeCl2 – Iron(II) chloride , Iron dichloride
- H2SO4 – Sulfuric acid
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]