Electrowinning of Zinc

ZnSO₄ + H₂O → Zn + H₂SO₄ + ½O₂

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Water H₂O	1	(l)
Sản phẩm	Zinc Zn	1	(s)
Sản phẩm	Sulfuric Acid H₂SO₄	1	(aq)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Electrowinning produces about 12 million tonnes of zinc annually. It is also used for copper, cobalt, nickel, and manganese recovery.

Tính chất

Loại: Electrochemical
Thuận nghịch: Không
Năng lượng: Thu nhiệt
ΔH: 469,0 kJ/mol

Phản ứng liên quan

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.