Electrowinning of Zinc

ZnSO4 + H2O → Zn + H2SO4 + ½O2

概要

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.

参加者

役割 物質 係数 状態
反応物 Water H₂O 1 (l)
生成物 Zinc Zn 1 (s)
生成物 Sulfuric Acid H₂SO₄ 1 (aq)

日常の例

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

産業上の重要性

電解採取は年間約1,200万トンの亜鉛を製造する。銅、コバルト、ニッケルにも適用される。高純度な製品が得られ、酸化還元電位を活用して不純物を除去できる。

特性

タイプ
Electrochemical
可逆的
いいえ
エネルギー
吸熱性
ΔH
469.0 kJ/mol

関連する反応

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.