Kupferflammtest

Kupfer an seiner blaugrünen Flamme erkennen

Flame Tests Beginner (Middle School) 15 Min. ~$7,00

Ziel

Die charakteristische blaugrüne Flamme von Kupfer(II)-Ionen beobachten — einer der visuell eindrucksvollsten Flammentests.

Hintergrund

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.

Sicherheitswarnungen

  • 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

Erforderliche PSA

goggles gloves lab_coat

Materialien

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

Ausrüstung

Bunsen burner Nichrome wire loop Watch glass Forceps

Durchführung

1

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

2 Min.
2

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

1 Min. Wear gloves when handling copper salts
3

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

1 Min.
4

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

2 Min.
5

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

1 Min.

Erwartete Ergebnisse

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.

Aufräumen

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

Details

Kategorie
Flame Tests
Schwierigkeit
Beginner (Middle School)
Dauer
15 Min.
Geschätzte Kosten
$7,00
Schritte
5
Materialien
3

Weitere Experimente

Bariumflammtest 20 min Calciumflammtest 15 min Kaliumflammtest 20 min Lithiumflammtest 15 min Natriumflammtest 15 min Strontiumflammtest 15 min Vergleichslabor für Flammentests 45 min

Frequently Asked Questions

What is the objective of Kupferflammtest?
Die charakteristische blaugrüne Flamme von Kupfer(II)-Ionen beobachten — einer der visuell eindrucksvollsten Flammentests.
How difficult is Kupferflammtest?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Kupferflammtest?
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 Kupferflammtest?
The main materials required are: Copper(II) sulfate (CuSO₄), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Kupferflammtest?
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.