Pelapisan Listrik dengan Tembaga

Mengendapkan lapisan tembaga tipis pada benda logam

Electrochemistry Intermediate (High School) 60 menit ~$15,00

Tujuan

Lapis kunci atau koin logam dengan tembaga secara elektris, mendemonstrasikan proses industri elektrodeposisi dan hukum Faraday.

Latar Belakang

Electroplating uses electrolysis to deposit a thin layer of metal onto a conductive surface. The object to be plated is made the cathode, and the plating metal (copper) is the anode. Copper ions from the solution are reduced and deposited on the cathode surface.

Peringatan Keselamatan

  • Copper sulfate solution is toxic
  • Dilute sulfuric acid is corrosive
  • Wear gloves and goggles
  • Handle electrical connections with care

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Copper(II) sulfate (CuSO₄) (200 mL)
    1M solution
  • Sulfuric acid (H₂SO₄) (10 mL)
    Dilute, to improve conductivity
  • Copper strip or sheet (1 piece)
    Anode
  • Metal key or coin (1)
    Object to plate (cathode)
  • Acetone or alcohol (20 mL)
    For cleaning the object

Peralatan

DC power supply (3-6V) Beaker (400 mL) Wires with alligator clips Sandpaper Analytical balance

Prosedur

1

Clean the object (key/coin) by sanding lightly and degreasing with acetone. A clean surface is critical for good plating.

5 menit Acetone is flammable
2

Weigh the clean object on the analytical balance and record the mass.

2 menit
3

Prepare the plating solution: 200 mL of 1M CuSO₄ with 5 mL of dilute H₂SO₄.

3 menit Wear gloves
4

Suspend the copper strip (anode) and the object (cathode) in the solution, connected to the power supply.

5 menit
5

Set the power supply to 3V and turn it on. Observe the copper being deposited on the cathode.

2 menit
6

Allow plating to continue for 30 minutes. Periodically check that gas bubbles are minimal (indicates correct voltage).

30 menit
7

Turn off the power supply. Remove the plated object, rinse with water, and dry gently.

3 menit
8

Weigh the plated object. Calculate the mass of copper deposited and compare with Faraday's law prediction.

5 menit

Hasil yang Diharapkan

A smooth, shiny copper coating should cover the object. The mass increase should correlate with Faraday's law: m = (M x I x t) / (n x F), where M is molar mass of Cu, I is current, t is time, n=2, and F is Faraday's constant.

Pembersihan

Dispose of copper sulfate solution in heavy metal waste. Rinse all equipment. Clean the copper anode for reuse.

Detail

Kategori
Electrochemistry
Tingkat Kesulitan
Intermediate (High School)
Durasi
60 menit
Perkiraan Biaya
$15,00
Langkah
8
Bahan
5

Eksperimen Lainnya

Baterai Lemon 20 min Elektrolisis Air 40 min Elektrolisis Tembaga Sulfat 50 min Konstruksi Sel Daniell 45 min Metode Pencegahan Karat 30 min Pengukuran Potensial Sel Volta 60 min Sel Konsentrasi 45 min Verifikasi Deret Aktivitas 30 min

Frequently Asked Questions

What is the objective of Pelapisan Listrik dengan Tembaga?
Lapis kunci atau koin logam dengan tembaga secara elektris, mendemonstrasikan proses industri elektrodeposisi dan hukum Faraday.
How difficult is Pelapisan Listrik dengan Tembaga?
This experiment is rated as Intermediate (High School). It takes approximately 60 minutes to complete.
What safety precautions are needed for Pelapisan Listrik dengan Tembaga?
Key safety precautions include: Copper sulfate solution is toxic; Dilute sulfuric acid is corrosive; Wear gloves and goggles.
What materials are needed for Pelapisan Listrik dengan Tembaga?
The main materials required are: Copper(II) sulfate (CuSO₄), Sulfuric acid (H₂SO₄), Copper strip or sheet, Metal key or coin, Acetone or alcohol.
What results should I expect from Pelapisan Listrik dengan Tembaga?
A smooth, shiny copper coating should cover the object. The mass increase should correlate with Faraday's law: m = (M x I x t) / (n x F), where M is molar mass of Cu, I is current, t is time, n=2, and F is Faraday's constant.