Hydrogen Peroxide as Oxidizing Agent (Acidic)

H2O2 + 2H+ + 2I− → I2 + 2H2O

概述

Hydrogen peroxide oxidizes iodide ions to iodine in acidic solution. H₂O₂ acts as the oxidizing agent, being reduced to water. The appearance of brown iodine (or blue-black with starch indicator) demonstrates the oxidizing power of H₂O₂. This reaction is used in iodometric analysis.

参与者

角色 物质 系数 状态
反应物 Hydrogen Peroxide H₂O₂ 1 (aq)
反应物 Iodine I 2 (aq)
产物 Water H₂O 2 (l)

日常示例

The iodine clock reaction, a popular chemistry demonstration with sudden color changes, uses variations of this H₂O₂-iodide reaction.

工业重要性

理解H₂O₂的氧化性对纸浆漂白、废水处理（高级氧化）、有机合成（环氧化、羟基化）和火箭推进剂（高浓度H₂O₂）的应用至关重要。

属性

类型
Redox
可逆
否
能量
放热
ΔH
-210.0 kJ/mol

相关反应

Iron(II) to Iron(III) Oxidation by Oxygen 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 Zinc Reduction of Silver Ion Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Hydrogen Peroxide as Oxidizing Agent (Acidic)?
The balanced equation is: H₂O₂ + 2H⁺ + 2I⁻ → I₂ + 2H₂O.
What type of reaction is Hydrogen Peroxide as Oxidizing Agent (Acidic)?
Hydrogen Peroxide as Oxidizing Agent (Acidic) is a redox reaction.
Is Hydrogen Peroxide as Oxidizing Agent (Acidic) exothermic or endothermic?
Hydrogen Peroxide as Oxidizing Agent (Acidic) is exothermic (releases energy). The enthalpy change (ΔH) is -210.0 kJ/mol.