Uji Nyala Tembaga

Mengidentifikasi tembaga dari nyala api biru-hijau

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

Tujuan

Amati nyala api biru-hijau khas yang dihasilkan oleh ion tembaga(II), salah satu uji nyala yang paling mengesankan secara visual.

Latar Belakang

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.

Peringatan Keselamatan

  • 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

APD yang Diperlukan

goggles gloves lab_coat

Bahan

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

Peralatan

Bunsen burner Nichrome wire loop Watch glass Forceps

Prosedur

1

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

2 menit
2

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

1 menit Wear gloves when handling copper salts
3

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

1 menit
4

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

2 menit
5

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

1 menit

Hasil yang Diharapkan

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.

Pembersihan

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

Detail

Kategori
Flame Tests
Tingkat Kesulitan
Beginner (Middle School)
Durasi
15 menit
Perkiraan Biaya
$7,00
Langkah
5
Bahan
3

Eksperimen Lainnya

Laboratorium Perbandingan Uji Nyala 45 min Uji Nyala Barium 20 min Uji Nyala Kalium 20 min Uji Nyala Kalsium 15 min Uji Nyala Litium 15 min Uji Nyala Natrium 15 min Uji Nyala Stronsium 15 min

Frequently Asked Questions

What is the objective of Uji Nyala Tembaga?
Amati nyala api biru-hijau khas yang dihasilkan oleh ion tembaga(II), salah satu uji nyala yang paling mengesankan secara visual.
How difficult is Uji Nyala Tembaga?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Uji Nyala Tembaga?
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 Uji Nyala Tembaga?
The main materials required are: Copper(II) sulfate (CuSO₄), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Uji Nyala Tembaga?
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.