바륨 불꽃 반응

황록색 불꽃으로 바륨 확인하기

Flame Tests Intermediate (High School) 20 분 ~$12.00

목표

바륨 이온이 나타내는 연한 황록색 불꽃을 관찰하고, 바륨 화합물에 추가적인 안전 주의가 필요한 이유를 이해한다.

배경

Barium compounds produce a pale yellow-green (apple-green) flame when heated. The emission is primarily from BaCl molecules formed in the flame rather than from atomic barium. Barium compounds are toxic and require careful handling, but the flame test itself uses small quantities safely.

안전 경고

  • Barium chloride is toxic if ingested
  • Wear nitrile gloves when handling barium compounds
  • Wear safety goggles at all times
  • Wash hands thoroughly after the experiment
  • Do not eat or drink in the lab

필수 개인 보호 장비

goggles gloves lab_coat

재료

  • Barium chloride (BaCl₂) (0.5 g)
    Toxic — handle with care
  • 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

Put on nitrile gloves before handling barium chloride.

1 분 Barium compounds are toxic
2

Clean the nichrome wire by dipping in HCl and heating until no color appears.

2 분
3

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

1 분 Avoid skin contact
4

Dip the clean wire into HCl, then into the barium chloride sample.

1 분
5

Hold the wire in the Bunsen burner flame and observe the pale yellow-green color.

2 분
6

Record the color and compare with copper (blue-green) if previously tested.

2 분

예상 결과

A pale yellow-green (apple-green) flame should appear. The color is less vivid than copper's blue-green and has a distinctly yellowish tint. It may be difficult to see in a well-lit room.

정리

Clean the wire with HCl. Dispose of barium waste in designated heavy metal waste container. Remove gloves carefully and wash hands thoroughly.

세부 정보

카테고리
Flame Tests
난이도
Intermediate (High School)
소요 시간
20 분
예상 비용
$12.00
단계
6
재료
3

더 많은 실험

스트론튬 불꽃 반응 15 min 나트륨 불꽃 반응 15 min 구리 불꽃 반응 15 min 리튬 불꽃 반응 15 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 바륨 불꽃 반응?
바륨 이온이 나타내는 연한 황록색 불꽃을 관찰하고, 바륨 화합물에 추가적인 안전 주의가 필요한 이유를 이해한다.
How difficult is 바륨 불꽃 반응?
This experiment is rated as Intermediate (High School). It takes approximately 20 minutes to complete.
What safety precautions are needed for 바륨 불꽃 반응?
Key safety precautions include: Barium chloride is toxic if ingested; Wear nitrile gloves when handling barium compounds; Wear safety goggles at all times.
What materials are needed for 바륨 불꽃 반응?
The main materials required are: Barium chloride (BaCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from 바륨 불꽃 반응?
A pale yellow-green (apple-green) flame should appear. The color is less vivid than copper's blue-green and has a distinctly yellowish tint. It may be difficult to see in a well-lit room.