H2S + Ca(OH)2 → CaS + 2 H2O – Balanced equation

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.]
• Ca(OH)₂ – Calcium hydroxide
  • Other names: {{ubl , Slaked lime , Calcium hydrate
  • Appearance: White powder ; Colourless crystals or white powder ; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]

Products:

• CaS – Calcium sulfide
  • Other names: Calcium monosulfide , Hepar calcies , Sulfurated lime , Oldhamite
  • Appearance: White crystals | hygroscopic
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas