Electrowinning of Zinc

ZnSO4 + H2O → Zn + H2SO4 + ½O2

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Water H₂O 1 (l)
생성물 Zinc Zn 1 (s)
생성물 Sulfuric Acid H₂SO₄ 1 (aq)

일상 속 예시

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

산업적 중요성

전 세계 아연 생산의 약 80%가 이 전착 공정을 통해 이루어집니다. 철강 방청 도금(용융 아연 도금) 및 황동 제조용 아연 공급에 핵심적입니다.

성질

유형
Electrochemical
가역 반응
아니오
에너지
흡열
ΔH
469.0 kJ/mol

관련 반응

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.