Pengukuran Potensial Sel Volta

Mengukur EMF berbagai kombinasi setengah sel

Electrochemistry Advanced (University) 60 menit ~$25,00

Tujuan

Ukur gaya gerak listrik (EMF) dari beberapa kombinasi sel galvanik dan bandingkan dengan nilai potensial reduksi standar.

Latar Belakang

By constructing galvanic cells with different metal/metal-ion half-cell combinations and measuring their voltages, students can experimentally determine relative electrode potentials. Comparing measured values with standard reduction potentials validates electrochemical theory.

Peringatan Keselamatan

  • Lead compounds are toxic — handle with extreme care
  • Wear nitrile gloves throughout
  • Wash hands immediately if lead solution contacts skin
  • Dispose of lead waste in designated containers

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Zinc strip and 1M ZnSO₄ (100 mL)
  • Copper strip and 1M CuSO₄ (100 mL)
  • Lead strip and 1M Pb(NO₃)₂ (100 mL)
    Toxic
  • Tin strip and 1M SnCl₂ (100 mL)
  • KNO₃ salt bridge solution (200 mL)
    Saturated
  • Filter paper strips (10)
    For salt bridges

Peralatan

Six 250 mL beakers High-impedance voltmeter or multimeter Wires with alligator clips Sandpaper

Prosedur

1

Sand all metal strips until shiny. Prepare 1M solutions of each metal salt in separate beakers.

5 menit Wear gloves for lead compounds
2

Prepare salt bridges by soaking filter paper strips in saturated KNO₃ solution.

3 menit
3

Construct a Zn/Cu cell: connect with a salt bridge and measure the EMF with the voltmeter.

5 menit
4

Construct a Zn/Pb cell and measure EMF.

5 menit Handle lead carefully
5

Construct a Zn/Sn cell and measure EMF.

5 menit
6

Construct a Cu/Pb cell and measure EMF.

5 menit
7

Construct a Sn/Cu cell and measure EMF.

5 menit
8

Tabulate all results. Calculate theoretical EMF values using standard reduction potentials and compare with measured values.

15 menit

Hasil yang Diharapkan

Zn/Cu: ~1.10 V, Zn/Pb: ~0.63 V, Zn/Sn: ~0.62 V, Cu/Pb: ~0.47 V, Sn/Cu: ~0.48 V. Measured values should be within 0.05-0.15 V of theoretical due to non-standard conditions.

Pembersihan

Collect all lead-containing waste in designated containers. Dispose of copper waste separately. Rinse metal strips and store. Wash hands thoroughly.

Detail

Kategori
Electrochemistry
Tingkat Kesulitan
Advanced (University)
Durasi
60 menit
Perkiraan Biaya
$25,00
Langkah
8
Bahan
6

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 Pelapisan Listrik dengan Tembaga 60 min Sel Konsentrasi 45 min Verifikasi Deret Aktivitas 30 min

Frequently Asked Questions

What is the objective of Pengukuran Potensial Sel Volta?
Ukur gaya gerak listrik (EMF) dari beberapa kombinasi sel galvanik dan bandingkan dengan nilai potensial reduksi standar.
How difficult is Pengukuran Potensial Sel Volta?
This experiment is rated as Advanced (University). It takes approximately 60 minutes to complete.
What safety precautions are needed for Pengukuran Potensial Sel Volta?
Key safety precautions include: Lead compounds are toxic — handle with extreme care; Wear nitrile gloves throughout; Wash hands immediately if lead solution contacts skin.
What materials are needed for Pengukuran Potensial Sel Volta?
The main materials required are: Zinc strip and 1M ZnSO₄, Copper strip and 1M CuSO₄, Lead strip and 1M Pb(NO₃)₂, Tin strip and 1M SnCl₂, KNO₃ salt bridge solution.
What results should I expect from Pengukuran Potensial Sel Volta?
Zn/Cu: ~1.10 V, Zn/Pb: ~0.63 V, Zn/Sn: ~0.62 V, Cu/Pb: ~0.47 V, Sn/Cu: ~0.48 V. Measured values should be within 0.05-0.15 V of theoretical due to non-standard conditions.