Iron(II) Sulfide Precipitation

FeSO₄ + Na₂S → FeS↓ + Na₂SO₄

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Produto	Sodium Sulfate Na₂SO₄	1	(aq)

Exemplo do cotidiano

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.

Importância industrial

O sulfureto de ferro é encontrado na indústria petrolífera como produto de corrosão em condutas e reservatórios. A sua formação em sedimentos anóxicos é importante na geoquímica, influenciando os ciclos biogeoquímicos do ferro e do enxofre.

Propriedades

Tipo: Precipitation
Reversível: Não
Energia: Exotérmico
ΔH: -75,0 kJ/mol

Reações relacionadas

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.