Baterai Lemon

Membuat sel galvanik sederhana dari buah jeruk

Electrochemistry Beginner (Middle School) 20 menit ~$5,00

Tujuan

Buat sel galvanik sederhana menggunakan lemon, koin tembaga, dan paku seng untuk mendemonstrasikan bagaimana energi kimia diubah menjadi energi listrik.

Latar Belakang

A lemon battery uses the citric acid in lemon juice as an electrolyte. The zinc nail acts as the anode (oxidation) and the copper coin as the cathode (reduction). The potential difference between zinc and copper drives electron flow through an external circuit.

Peringatan Keselamatan

  • Do not eat the lemons after the experiment — they contain metal residues
  • Handle sharp nails with care

APD yang Diperlukan

goggles

Bahan

  • Fresh lemons (3)
    Large and juicy
  • Copper coins or strips (3)
    Clean pennies or Cu strips
  • Zinc-coated nails (3)
    Galvanized nails
  • Insulated copper wire (1 m)
    With alligator clips
  • LED light (1)
    Low-voltage red LED

Peralatan

Multimeter Wire strippers Alligator clips

Prosedur

1

Roll each lemon on a flat surface while pressing gently to break the internal membranes and release juice.

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2

Insert a copper coin or strip into one side of each lemon and a zinc nail into the other side. Keep the metals about 3 cm apart.

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3

Use the multimeter to measure the voltage across a single lemon cell (between the copper and zinc). Record the voltage.

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4

Connect three lemons in series: zinc of lemon 1 to copper of lemon 2, zinc of lemon 2 to copper of lemon 3.

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5

Measure the total voltage of the three cells in series.

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6

Connect the LED to the free copper and zinc terminals. Observe if it lights up.

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7

Record observations about brightness and voltage over time.

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Hasil yang Diharapkan

Each lemon cell should produce approximately 0.9-1.0 V. Three in series should give about 2.7-3.0 V, enough to dimly light a red LED. The voltage will slowly decrease over time as the zinc is consumed.

Pembersihan

Remove all metal pieces from the lemons. Dispose of the lemons in the trash (not compost). Wipe down the metal pieces for reuse.

Detail

Kategori
Electrochemistry
Tingkat Kesulitan
Beginner (Middle School)
Durasi
20 menit
Perkiraan Biaya
$5,00
Langkah
7
Bahan
5

Eksperimen Lainnya

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 Pengukuran Potensial Sel Volta 60 min Sel Konsentrasi 45 min Verifikasi Deret Aktivitas 30 min

Frequently Asked Questions

What is the objective of Baterai Lemon?
Buat sel galvanik sederhana menggunakan lemon, koin tembaga, dan paku seng untuk mendemonstrasikan bagaimana energi kimia diubah menjadi energi listrik.
How difficult is Baterai Lemon?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Baterai Lemon?
Key safety precautions include: Do not eat the lemons after the experiment — they contain metal residues; Handle sharp nails with care.
What materials are needed for Baterai Lemon?
The main materials required are: Fresh lemons, Copper coins or strips, Zinc-coated nails, Insulated copper wire, LED light.
What results should I expect from Baterai Lemon?
Each lemon cell should produce approximately 0.9-1.0 V. Three in series should give about 2.7-3.0 V, enough to dimly light a red LED. The voltage will slowly decrease over time as the zinc is consumed.