리튬 불꽃 반응

심홍색 불꽃으로 리튬 확인하기

Flame Tests Beginner (Middle School) 15 분 ~$8.00

목표

리튬 이온이 나타내는 특징적인 심홍색 불꽃 색을 관찰하고, 다른 알칼리 금속의 불꽃 반응과 비교한다.

배경

Lithium produces a distinctive crimson-red flame when heated. The emission occurs primarily at 670.8 nm as the excited 2s electron returns to the ground state. Lithium compounds were historically used to produce red colors in fireworks before the introduction of strontium-based alternatives.

안전 경고

  • Wear safety goggles at all times
  • Keep hair tied back near open flames
  • Handle HCl with care

필수 개인 보호 장비

goggles lab_coat

재료

  • Lithium chloride (LiCl) (1 g)
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

장비

Bunsen burner Nichrome wire loop Watch glass Forceps

실험 절차

1

Clean the nichrome wire by dipping in HCl and heating until no color is visible in the flame.

2 분
2

Place a small amount of lithium chloride on the watch glass.

1 분
3

Dip the clean wire into HCl, then touch it to the lithium chloride sample.

1 분
4

Hold the wire in the Bunsen burner flame and observe the characteristic crimson-red color.

2 분 Keep face away from flame
5

Record observations and compare with the sodium flame test if already performed.

1 분

예상 결과

A bright crimson-red flame should appear. The color is distinct from the red produced by strontium (which is more scarlet) and potassium (which is lilac/violet).

정리

Clean the wire loop with HCl. Dispose of chemicals per lab protocol.

세부 정보

카테고리
Flame Tests
난이도
Beginner (Middle School)
소요 시간
15 분
예상 비용
$8.00
단계
5
재료
3

더 많은 실험

스트론튬 불꽃 반응 15 min 나트륨 불꽃 반응 15 min 구리 불꽃 반응 15 min 바륨 불꽃 반응 20 min 칼륨 불꽃 반응 20 min 칼슘 불꽃 반응 15 min 불꽃 반응 비교 실험 45 min

Frequently Asked Questions

What is the objective of 리튬 불꽃 반응?
리튬 이온이 나타내는 특징적인 심홍색 불꽃 색을 관찰하고, 다른 알칼리 금속의 불꽃 반응과 비교한다.
How difficult is 리튬 불꽃 반응?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for 리튬 불꽃 반응?
Key safety precautions include: Wear safety goggles at all times; Keep hair tied back near open flames; Handle HCl with care.
What materials are needed for 리튬 불꽃 반응?
The main materials required are: Lithium chloride (LiCl), Hydrochloric acid (HCl), Distilled water.
What results should I expect from 리튬 불꽃 반응?
A bright crimson-red flame should appear. The color is distinct from the red produced by strontium (which is more scarlet) and potassium (which is lilac/violet).