銅炎色反応

青緑色の炎で銅を同定する

Flame Tests Beginner (Middle School) 15 分 ~$7.00

目的

銅(II)イオンが生じる特徴的な青緑色の炎を観察する。視覚的に最も印象的な炎色反応の一つである。

背景

Copper produces a brilliant blue-green flame due to emission from excited Cu2+ ions. When copper(II) chloride is used, the emission is enhanced because volatile CuCl molecules form in the flame, producing particularly vivid colors. The blue-green color of copper flames has been used in fireworks for centuries.

安全上の警告

  • Wear safety goggles at all times
  • Copper compounds are toxic — do not ingest
  • Wash hands thoroughly after handling copper salts
  • Keep hair tied back near open flames

必要なPPE

goggles gloves lab_coat

材料

  • Copper(II) sulfate (CuSO₄) (1 g)
    Blue crystals
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

器具

Bunsen burner Nichrome wire loop Watch glass Forceps

手順

1

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

2 分
2

Place a small amount of copper(II) sulfate on the watch glass.

1 分 Wear gloves when handling copper salts
3

Dip the clean wire into HCl, then into the copper(II) sulfate sample.

1 分
4

Hold the wire in the Bunsen burner flame and observe the vibrant blue-green color.

2 分
5

Record the color and note any variations as the sample is consumed.

1 分

予想される結果

A vivid blue-green to green flame should appear. The color is one of the most distinctive and easily recognized of all flame tests. The flame may show different shades as the copper compound volatilizes.

後片付け

Clean the wire with HCl. Dispose of copper compound waste in designated heavy metal waste container. Wash hands thoroughly.

詳細

カテゴリ
Flame Tests
難易度
Beginner (Middle School)
所要時間
15 分
推定費用
$7.00
ステップ数
5
材料
3

その他の実験

カリウム炎色反応 20 min カルシウム炎色反応 15 min ストロンチウム炎色反応 15 min ナトリウム炎色反応 15 min バリウム炎色反応 20 min リチウム炎色反応 15 min 炎色反応比較実験 45 min

Frequently Asked Questions

What is the objective of 銅炎色反応?
銅(II)イオンが生じる特徴的な青緑色の炎を観察する。視覚的に最も印象的な炎色反応の一つである。
How difficult is 銅炎色反応?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for 銅炎色反応?
Key safety precautions include: Wear safety goggles at all times; Copper compounds are toxic — do not ingest; Wash hands thoroughly after handling copper salts.
What materials are needed for 銅炎色反応?
The main materials required are: Copper(II) sulfate (CuSO₄), Hydrochloric acid (HCl), Distilled water.
What results should I expect from 銅炎色反応?
A vivid blue-green to green flame should appear. The color is one of the most distinctive and easily recognized of all flame tests. The flame may show different shades as the copper compound volatilizes.