Copper Electroplating

Cu2+ + 2e− → Cu

Overview

Copper ions from a CuSO₄ solution are reduced at the cathode surface, depositing a thin layer of metallic copper. The anode is typically a copper bar that dissolves to replenish Cu²⁺ in solution. Current density, temperature, and additives control the deposit quality, grain size, and brightness.

Participants

Role Substance Coefficient State
Product Copper Cu 1 (s)

Everyday Example

The shiny copper plating on decorative items, trophies, and plumbing fixtures is applied by this electrochemical process.

Industrial Importance

Copper electroplating is essential in PCB manufacturing, semiconductor interconnects, and decorative finishing. It creates the conducting layers in all electronic devices.

Properties

Type
Electrochemical
Reversible
Yes
Energy
Exothermic
ΔH
-65.5 kJ/mol

Related Reactions

Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Daniell Cell (Zinc-Copper Galvanic Cell) Electrochemical CO₂ Reduction to CO Electrochemical Machining (ECM) Electrolysis of Molten NaCl (Downs Process) Electrolysis of Water

Frequently Asked Questions

What is the equation for Copper Electroplating?
The balanced equation is: Cu²⁺ + 2e⁻ → Cu.
What type of reaction is Copper Electroplating?
Copper Electroplating is a electrochemical reaction. It is reversible under certain conditions.
Is Copper Electroplating exothermic or endothermic?
Copper Electroplating is exothermic (releases energy). The enthalpy change (ΔH) is -65.5 kJ/mol.