Electrorefining of Copper

Cu (impure) → Cu2+ + 2e− → Cu (pure)

概述

Impure copper anodes (99.5%) dissolve electrochemically while pure copper (99.99%) deposits at the cathode from CuSO₄/H₂SO₄ electrolyte. Impurities either remain in solution or fall as anode slime (containing gold, silver, platinum). The voltage required is only 0.2–0.3 V since the same reaction occurs at both electrodes.

参与者

角色 物质 系数 状态
反应物 Copper Cu 1 (s)
产物 Copper Cu 1 (s)

日常示例

All the copper wiring in your home was refined to 99.99% purity by this electrorefining process.

工业重要性

电解精炼是生产电子级高纯铜的标准方法，全球年电解铜产量超2000万吨。精炼过程中阳极泥还富集金、银、铂族金属等贵金属副产品。

属性

类型
Electrochemical
可逆
否
能量
吸热
ΔH
0.0 kJ/mol

相关反应

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Frequently Asked Questions

What is the equation for Electrorefining of Copper?
The balanced equation is: Cu (impure) → Cu²⁺ + 2e⁻ → Cu (pure).
What type of reaction is Electrorefining of Copper?
Electrorefining of Copper is a electrochemical reaction.
Is Electrorefining of Copper exothermic or endothermic?
Electrorefining of Copper is endothermic (absorbs energy). The enthalpy change (ΔH) is 0.0 kJ/mol.