Electrowinning of Zinc

ZnSO4 + H2O → Zn + H2SO4 + ½O2

概述

Zinc electrowinning (electroextraction) deposits zinc metal from purified zinc sulfate solution onto aluminum cathodes. The cathode deposit is stripped every 24–48 hours and melted into zinc ingots. The regenerated sulfuric acid is recycled to leach more zinc ore. About 90% of the world's zinc is produced by this hydrometallurgical route.

参与者

角色 物质 系数 状态
反应物 Water H₂O 1 (l)
产物 Zinc Zn 1 (s)
产物 Sulfuric Acid H₂SO₄ 1 (aq)

日常示例

Zinc used in galvanized steel, brass, and zinc alloy die-castings is predominantly produced by this electrowinning process.

工业重要性

电积法生产了全球约80%的精锌，主要用于钢铁热镀锌防腐、黄铜合金制造和锌基电池。

属性

类型
Electrochemical
可逆
否
能量
吸热
ΔH
469.0 kJ/mol

相关反应

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Electrowinning of Zinc?
The balanced equation is: ZnSO₄ + H₂O → Zn + H₂SO₄ + ½O₂.
What type of reaction is Electrowinning of Zinc?
Electrowinning of Zinc is a electrochemical reaction.
Is Electrowinning of Zinc exothermic or endothermic?
Electrowinning of Zinc is endothermic (absorbs energy). The enthalpy change (ΔH) is 469.0 kJ/mol.