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:

  • FeCl3Iron(III) chloride source: wikipedia, accessed on: 2019-09-27source: ICSC, accessed on: 2019-09-04, Iron trichloride source: wikipedia, accessed on: 2019-09-27source: ICSC, accessed on: 2019-09-04
    • Other names: Ferric chloride source: wikidata, accessed on: 2019-09-02, Ferric chloride (anhydrous) source: ICSC, accessed on: 2019-09-04, Iron(3+);trichloride source: wikidata, accessed on: 2019-09-02
    • Appearance: Green-black by reflected light; purple-red by transmitted light; yellow solid as hexahydrate; brown as solution source: wikipedia, accessed on: 2019-09-27; Black-to-brown hygroscopic crystals source: ICSC, accessed on: 2019-09-04
  • H2SHydrogen sulfide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02
    • Other names: Dihydrogen monosulfide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Dihydrogen sulfide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Sewer gas source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: NIOSH NPG, accessed on: 2019-09-02
    • Appearance: Colorless gas source: wikipedia, accessed on: 2019-09-27; Colourless compressed liquefied gas with characteristic odour of rotten eggs source: ICSC, accessed on: 2019-09-04; 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.] source: NIOSH NPG, accessed on: 2019-09-02

Products:

  • FeCl2Iron(II) chloride source: wikipedia, accessed on: 2019-09-27source: ICSC, accessed on: 2019-09-04, Iron dichloride source: wikipedia, accessed on: 2019-09-27source: ICSC, accessed on: 2019-09-04
    • Other names: Ferrous chloride source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04, Rokühnite source: wikipedia, accessed on: 2019-09-27, [FeCl3] source: wikidata, accessed on: 2019-09-02, FeCl3 source: wikidata, accessed on: 2019-09-02
    • Appearance: Tan solid (anhydrous) | Pale green solid (di-tetrahydrate) source: wikipedia, accessed on: 2019-09-27; White-to-light-green hygroscopic crystals source: ICSC, accessed on: 2019-09-04
  • S
    • Names: Sulfur source: wikidata, accessed on: 2019-09-07source: ICSC, accessed on: 2019-09-04, S source: wikidata, accessed on: 2019-09-07, Sulphur source: wikidata, accessed on: 2019-09-07source: ICSC, accessed on: 2019-09-04
    • Appearance: Yellow solid in various forms source: ICSC, accessed on: 2019-09-04
  • HClChlorane source: wikipedia, accessed on: 2019-09-27, Hydrogen chloride source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02
    • Other names: Hydrochloric acid source: wikipedia, accessed on: 2019-09-27source: NIOSH NPG, accessed on: 2019-09-02, Hydrochloric acid gas source: wikipedia, accessed on: 2019-09-27, HCl source: wikidata, accessed on: 2019-09-02
    • Appearance: Colorless, transparent liquid, fumes in air if concentrated source: wikipedia, accessed on: 2019-09-27; Colorless gas source: wikipedia, accessed on: 2019-09-27; Colourless compressed liquefied gas with pungent odour source: ICSC, accessed on: 2019-09-04; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed on: 2019-09-02