레몬 전지

감귤류 과일로 간단한 갈바니 전지 만들기

Electrochemistry Beginner (Middle School) 20 분 ~$5.00

목표

레몬, 구리 동전, 아연 못을 사용하여 간단한 갈바니 전지를 만들고, 화학 에너지가 전기 에너지로 전환되는 원리를 실증한다.

배경

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.

안전 경고

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

필수 개인 보호 장비

goggles

재료

  • 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

장비

Multimeter Wire strippers Alligator clips

실험 절차

1

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

2 분
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.

3 분 Handle nails carefully
3

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

2 분
4

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

5 분
5

Measure the total voltage of the three cells in series.

2 분
6

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

3 분
7

Record observations about brightness and voltage over time.

3 분

예상 결과

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.

정리

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

세부 정보

카테고리
Electrochemistry
난이도
Beginner (Middle School)
소요 시간
20 분
예상 비용
$5.00
단계
7
재료
5

더 많은 실험

황산구리 전기분해 50 min 다니엘 전지 제작 45 min 활동도 순서 확인 30 min 농도 전지 45 min 구리 전기도금 60 min 물의 전기분해 40 min 볼타 전지 기전력 측정 60 min 녹 방지 방법 비교 30 min

Frequently Asked Questions

What is the objective of 레몬 전지?
레몬, 구리 동전, 아연 못을 사용하여 간단한 갈바니 전지를 만들고, 화학 에너지가 전기 에너지로 전환되는 원리를 실증한다.
How difficult is 레몬 전지?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for 레몬 전지?
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 레몬 전지?
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 레몬 전지?
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.