Electrowinning of Zinc

ZnSO₄ + H₂O → Zn + H₂SO₄ + ½O₂

Ikhtisar

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.

Peserta

Peran	Zat	Koefisien	Keadaan
Reaktan	Water H₂O	1	(l)
Produk	Zinc Zn	1	(s)
Produk	Sulfuric Acid H₂SO₄	1	(aq)

Contoh Sehari-hari

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

Pentingnya dalam Industri

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

Sifat

Jenis: Electrochemical
Dapat Dibalik: Tidak
Energi: Endoterm
ΔH: 469,0 kJ/mol

Reaksi Terkait

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.