Iron(II) Sulfide Precipitation

FeSO4 + Na2S → FeS↓ + Na2SO4

概要

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.

参加者

役割 物質 係数 状態
生成物 Sodium Sulfate Na₂SO₄ 1 (aq)

日常の例

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.

産業上の重要性

硫化鉄は酸性ガス井の腐食生成物として石油産業で問題となる。硫酸塩還元菌による嫌気性腐食は海洋パイプラインや貯蔵タンクに深刻なダメージを与える。

特性

タイプ
Precipitation
可逆的
いいえ
エネルギー
発熱性
ΔH
-75.0 kJ/mol

関連する反応

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.