Iron(II) Sulfide Precipitation

FeSO4 + Na2S → FeS↓ + Na2SO4

Übersicht

Iron(II) sulfate reacts with sodium sulfide to form a black precipitate of iron(II) sulfide (Ksp = 6 × 10⁻¹⁸). FeS reacts with dilute acids to produce hydrogen sulfide gas with its characteristic rotten egg smell. The mineral form is troilite, found in meteorites.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Produkt Sodium Sulfate Na₂SO₄ 1 (aq)

Alltägliches Beispiel

The black spots in hard-boiled eggs at the yolk-white junction are iron sulfide, formed by reaction of iron in the yolk with sulfur from the egg white.

Industrielle Bedeutung

Iron sulfide is encountered in the petroleum industry as a corrosion product in sour gas wells and is the mineral pyrrhotite in geological formations.

Eigenschaften

Typ
Precipitation
Reversibel
Nein
Energie
Exotherm
ΔH
-75,0 kJ/mol

Verwandte Reaktionen

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Fluoride Precipitation (Fluorite) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Iron(II) Sulfide Precipitation?
The balanced equation is: FeSO₄ + Na₂S → FeS↓ + Na₂SO₄.
What type of reaction is Iron(II) Sulfide Precipitation?
Iron(II) Sulfide Precipitation is a precipitation reaction.
Is Iron(II) Sulfide Precipitation exothermic or endothermic?
Iron(II) Sulfide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -75.0 kJ/mol.