Chlor-Alkali Electrolysis
2NaCl + 2H2O → Cl2 + 2NaOH + H2
Tổng quan
Electrolysis of concentrated brine (NaCl solution) produces three essential industrial chemicals simultaneously: chlorine gas at the anode, sodium hydroxide solution at the cathode, and hydrogen gas as a byproduct. Modern membrane cells use ion-exchange membranes to separate products and achieve 95%+ current efficiency.
Người tham gia
| Vai trò | Chất | Hệ số | Trạng thái |
|---|---|---|---|
| Chất phản ứng | Sodium Chloride NaCl | 2 | (aq) |
| Chất phản ứng | Water H₂O | 2 | (l) |
| Sản phẩm | Sodium Hydroxide NaOH | 2 | (aq) |
Ví dụ thực tế
The chlorine in your tap water and the lye in drain cleaner both come from this single electrochemical process.
Tầm quan trọng công nghiệp
The chlor-alkali industry produces about 75 million tonnes of NaOH and 65 million tonnes of Cl₂ annually, consuming about 1% of global electricity.
Tính chất
- Loại
- Electrochemical
- Thuận nghịch
- Không
- Năng lượng
- Thu nhiệt
- ΔH
- 422,0 kJ/mol
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Frequently Asked Questions
What is the equation for Chlor-Alkali Electrolysis?
The balanced equation is: 2NaCl + 2H₂O → Cl₂ + 2NaOH + H₂.
What type of reaction is Chlor-Alkali Electrolysis?
Chlor-Alkali Electrolysis is a electrochemical reaction.
Is Chlor-Alkali Electrolysis exothermic or endothermic?
Chlor-Alkali Electrolysis is endothermic (absorbs energy). The enthalpy change (ΔH) is 422.0 kJ/mol.