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

4Fe²⁺ + O₂ + 4H⁺ → 4Fe³⁺ + 2H₂O

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Oxygen O	1	(g)
Sản phẩm	Water H₂O	2	(l)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Iron(II)/iron(III) redox chemistry is fundamental to water treatment, geochemistry, soil science, and corrosion engineering.

Tính chất

Loại: Redox
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -176,0 kJ/mol

Phản ứng liên quan

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.