Electrorefining of Copper

Cu (impure) → Cu2+ + 2e− → Cu (pure)

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Copper Cu 1 (s)
생성물 Copper Cu 1 (s)

일상 속 예시

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

산업적 중요성

전기·전자 산업에 필요한 고순도 구리 생산의 표준 공정입니다. 양극 슬라임에서 금, 은 등 귀금속을 회수하는 부가 가치도 있습니다.

성질

유형
Electrochemical
가역 반응
아니오
에너지
흡열
ΔH
0.0 kJ/mol

관련 반응

Electrolysis of Water Electrolytic Production of Chlorate Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Sodium-Sulfur Battery Electrochemical CO₂ Reduction to CO

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.