2 FeCl3 + H2S → 2 FeCl2 + S + 2 HCl
This is an oxidation-reduction (redox) reaction:
S-II - 2 e- → S0 (oxidation)
2 FeIII + 2 e- → 2 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.]
- Other names: D
Products:
- FeCl2 – Iron(II) chloride
, Iron dichloride
- S
- 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.]
- Other names: Hydrochloric acid