Iron(II) Sulfide Precipitation

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

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。