Electrowinning of Zinc
ZnSO4 + H2O → Zn + H2SO4 + ½O2
Обзор
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.
Участники
| Роль | Вещество | Коэффициент | Состояние |
|---|---|---|---|
| Реагент | Water H₂O | 1 | (l) |
| Продукт | Zinc Zn | 1 | (s) |
| Продукт | Sulfuric Acid H₂SO₄ | 1 | (aq) |
Пример из жизни
Zinc used in galvanized steel, brass, and zinc alloy die-castings is predominantly produced by this electrowinning process.
Промышленное значение
Electrowinning produces about 12 million tonnes of zinc annually. It is also used for copper, cobalt, nickel, and manganese recovery.
Свойства
- Тип
- Electrochemical
- Обратимая
- Нет
- Энергия
- Эндотермическая
- ΔH
- 469,0 kJ/mol
Связанные реакции
Electrorefining of Copper
Alkaline Battery Discharge
Anodizing of Aluminum
Chlor-Alkali Electrolysis
Nickel-Metal Hydride Battery
Daniell Cell (Zinc-Copper Galvanic Cell)
Electrolysis of Molten NaCl (Downs Process)
Lead-Acid Battery Discharge
Hall-Héroult Process (Aluminum Smelting)
Electrolysis of Water
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.