Elektrolisis Tembaga Sulfat

Elektrolisis kuantitatif dengan elektroda tembaga

Electrochemistry Intermediate (High School) 50 menit ~$12,00

Tujuan

Lakukan elektrolisis kuantitatif larutan tembaga sulfat menggunakan elektroda tembaga dan verifikasi hukum pertama elektrolisis Faraday.

Latar Belakang

When copper sulfate solution is electrolyzed with copper electrodes, copper is deposited at the cathode and dissolved from the anode. By measuring mass changes and current, Faraday's law can be verified: the mass of substance deposited is proportional to the charge passed.

Peringatan Keselamatan

  • Copper sulfate is toxic if ingested
  • Wear gloves when handling solutions
  • Handle electrical connections with dry hands

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Copper(II) sulfate (CuSO₄) (200 mL)
    1M solution
  • Copper strips (2) (2 pieces)
    Similar size, sanded clean

Peralatan

DC power supply (1-5V) Ammeter Beaker (400 mL) Wires Analytical balance Timer Sandpaper

Prosedur

1

Sand both copper strips until shiny. Wash with distilled water and dry. Weigh each strip accurately on the analytical balance.

5 menit
2

Pour 200 mL of 1M CuSO₄ into the beaker.

2 menit Wear gloves
3

Connect the circuit: power supply → ammeter → anode (Cu strip) → solution → cathode (Cu strip) → power supply.

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4

Set the power supply to give a steady current of about 0.5 A. Record the exact current.

2 menit
5

Run the electrolysis for exactly 20 minutes, monitoring the current.

20 menit
6

Turn off the power supply. Carefully remove both electrodes, rinse with distilled water, dry, and reweigh.

5 menit
7

Calculate the charge passed (Q = I x t). Calculate theoretical mass deposited using Faraday's law: m = (M x Q) / (n x F). Compare with actual mass change.

8 menit

Hasil yang Diharapkan

The cathode should gain mass and the anode should lose approximately the same mass. At 0.5 A for 20 min: Q = 600 C, theoretical mass = (63.55 x 600) / (2 x 96485) = 0.197 g. Measured value should be within 10%.

Pembersihan

Dispose of copper sulfate solution in heavy metal waste. Rinse and store copper strips. Clean the beaker and equipment.

Detail

Kategori
Electrochemistry
Tingkat Kesulitan
Intermediate (High School)
Durasi
50 menit
Perkiraan Biaya
$12,00
Langkah
7
Bahan
2

Eksperimen Lainnya

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

Frequently Asked Questions

What is the objective of Elektrolisis Tembaga Sulfat?
Lakukan elektrolisis kuantitatif larutan tembaga sulfat menggunakan elektroda tembaga dan verifikasi hukum pertama elektrolisis Faraday.
How difficult is Elektrolisis Tembaga Sulfat?
This experiment is rated as Intermediate (High School). It takes approximately 50 minutes to complete.
What safety precautions are needed for Elektrolisis Tembaga Sulfat?
Key safety precautions include: Copper sulfate is toxic if ingested; Wear gloves when handling solutions; Handle electrical connections with dry hands.
What materials are needed for Elektrolisis Tembaga Sulfat?
The main materials required are: Copper(II) sulfate (CuSO₄), Copper strips (2).
What results should I expect from Elektrolisis Tembaga Sulfat?
The cathode should gain mass and the anode should lose approximately the same mass. At 0.5 A for 20 min: Q = 600 C, theoretical mass = (63.55 x 600) / (2 x 96485) = 0.197 g. Measured value should be within 10%.