Electrowinning of Zinc

ZnSO4 + H2O → Zn + H2SO4 + ½O2

Genel Bakış

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.

Katılımcılar

Rol Madde Katsayı Hal
Reaktan Water H₂O 1 (l)
Ürün Zinc Zn 1 (s)
Ürün Sulfuric Acid H₂SO₄ 1 (aq)

Günlük Örnek

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

Endüstriyel Önemi

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

Özellikler

Tür
Electrochemical
Geri Dönüşümlü
Hayır
Enerji
Endotermik
ΔH
469,0 kJ/mol

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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.