Iron(II) to Iron(III) Oxidation by Oxygen

4Fe2+ + O2 + 4H+ → 4Fe3+ + 2H2O

概述

Ferrous ions (Fe²⁺) are oxidized to ferric ions (Fe³⁺) by dissolved oxygen in acidic solution. This reaction is responsible for the yellowing of iron-containing groundwater upon exposure to air. The green Fe²⁺ solution turns yellow-brown as Fe³⁺ forms.

参与者

角色 物质 系数 状态
反应物 Oxygen O 1 (g)
产物 Water H₂O 2 (l)

日常示例

Well water that is clear underground but turns rusty brown when left standing is undergoing this oxidation of dissolved iron(II) by air.

工业重要性

铁(II)/铁(III)氧化还原化学是水处理（氧化除铁）、地球化学（成岩作用）、土壤科学（氧化还原电位）和腐蚀工程的核心基础知识。

属性

类型
Redox
可逆
否
能量
放热
ΔH
-176.0 kJ/mol

相关反应

Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Zinc Reduction of Silver Ion Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Iron(II) to Iron(III) Oxidation by Oxygen?
The balanced equation is: 4Fe²⁺ + O₂ + 4H⁺ → 4Fe³⁺ + 2H₂O.
What type of reaction is Iron(II) to Iron(III) Oxidation by Oxygen?
Iron(II) to Iron(III) Oxidation by Oxygen is a redox reaction.
Is Iron(II) to Iron(III) Oxidation by Oxygen exothermic or endothermic?
Iron(II) to Iron(III) Oxidation by Oxygen is exothermic (releases energy). The enthalpy change (ΔH) is -176.0 kJ/mol.