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

4Fe2+ + O2 + 4H+ → 4Fe3+ + 2H2O

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Oxygen O 1 (g)
생성물 Water H₂O 2 (l)

일상 속 예시

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

산업적 중요성

수처리에서 용해성 철(Ⅱ) 이온을 불용성 철(Ⅲ) 수산화물로 전환하여 여과 제거하는 폭기-침전 공정에 적용됩니다. 지하수 철 제거의 핵심 반응입니다.

성질

유형
Redox
가역 반응
아니오
에너지
발열
ΔH
-176.0 kJ/mol

관련 반응

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.