Uji Nyala Barium

Mengidentifikasi barium dari nyala api kuning-hijau

Flame Tests Intermediate (High School) 20 menit ~$12,00

Tujuan

Amati nyala api kuning-hijau pucat yang dihasilkan oleh ion barium dan pahami mengapa senyawa barium memerlukan tindakan keamanan tambahan.

Latar Belakang

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.

Peringatan Keselamatan

  • 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

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Barium chloride (BaCl₂) (0.5 g)
    Toxic — handle with care
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

Peralatan

Bunsen burner Nichrome wire loop Watch glass Forceps

Prosedur

1

Put on nitrile gloves before handling barium chloride.

1 menit Barium compounds are toxic
2

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

2 menit
3

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

1 menit Avoid skin contact
4

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

1 menit
5

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

2 menit
6

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

2 menit

Hasil yang Diharapkan

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.

Pembersihan

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

Detail

Kategori
Flame Tests
Tingkat Kesulitan
Intermediate (High School)
Durasi
20 menit
Perkiraan Biaya
$12,00
Langkah
6
Bahan
3

Eksperimen Lainnya

Laboratorium Perbandingan Uji Nyala 45 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 Uji Nyala Tembaga 15 min

Frequently Asked Questions

What is the objective of Uji Nyala Barium?
Amati nyala api kuning-hijau pucat yang dihasilkan oleh ion barium dan pahami mengapa senyawa barium memerlukan tindakan keamanan tambahan.
How difficult is Uji Nyala Barium?
This experiment is rated as Intermediate (High School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Uji Nyala Barium?
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 Uji Nyala Barium?
The main materials required are: Barium chloride (BaCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Uji Nyala Barium?
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.