Electrowinning of Zinc

ZnSO4 + H2O → Zn + H2SO4 + ½O2

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Water H₂O 1 (l)
उत्पाद Zinc Zn 1 (s)
उत्पाद Sulfuric Acid H₂SO₄ 1 (aq)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार
Electrochemical
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माशोषी
ΔH
469.0 kJ/mol

संबंधित अभिक्रियाएँ

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.