Iron(II) Sulfide Precipitation

FeSO4 + Na2S → FeS↓ + Na2SO4

概述

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.

参与者

角色 物质 系数 状态
产物 Sodium Sulfate Na₂SO₄ 1 (aq)

日常示例

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.

工业重要性

硫化亚铁在石油工业中作为酸性气体（H₂S）与铁设备的腐蚀产物大量出现，是套管、管道腐蚀失效的重要原因，也是陨磁铁矿（磁黄铁矿）的主要矿物。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-75.0 kJ/mol

相关反应

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.