Uji Nyala Natrium

Mengidentifikasi natrium dari nyala api kuning terang

Flame Tests Beginner (Middle School) 15 menit ~$5,00

Tujuan

Amati nyala api kuning terang khas yang dihasilkan saat senyawa natrium dipanaskan, menunjukkan bagaimana ion logam menghasilkan warna nyala api yang spesifik.

Latar Belakang

The sodium flame test is one of the simplest and most dramatic qualitative analysis techniques. When sodium ions are introduced into a flame, the thermal energy excites the 3s valence electron to the 3p orbital. As the electron returns to the ground state, it emits light at 589 nm, producing an intense and persistent yellow-orange color. This is the same emission responsible for the yellow color of sodium vapor street lamps.

Peringatan Keselamatan

  • Wear safety goggles at all times
  • Keep hair tied back near open flames
  • Handle HCl with care — avoid skin contact
  • Ensure proper ventilation

APD yang Diperlukan

goggles lab_coat

Bahan

  • Sodium chloride (NaCl) (1 g)
    Table salt works
  • 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 it in 1M HCl and holding it in the hottest part of the Bunsen burner flame. Repeat until no color appears in the flame.

2 menit
2

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

1 menit
3

Dip the clean nichrome wire into the HCl, then into the sodium chloride sample to pick up a small amount.

1 menit
4

Hold the wire loop with the sample at the edge of the Bunsen burner flame and observe the flame color.

2 menit Keep face away from flame
5

Record the flame color observed. Note the intensity and persistence of the color.

1 menit
6

Clean the wire again with HCl and repeat to confirm results.

2 menit

Hasil yang Diharapkan

A bright, persistent yellow-orange flame should appear immediately when the sodium chloride is introduced to the flame. The color is so intense that it can mask the colors of other metal ions present.

Pembersihan

Clean the nichrome wire loop thoroughly with HCl. Dispose of remaining chemicals according to lab protocols. Wipe down the work area.

Detail

Kategori
Flame Tests
Tingkat Kesulitan
Beginner (Middle School)
Durasi
15 menit
Perkiraan Biaya
$5,00
Langkah
6
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 Stronsium 15 min Uji Nyala Tembaga 15 min

Frequently Asked Questions

What is the objective of Uji Nyala Natrium?
Amati nyala api kuning terang khas yang dihasilkan saat senyawa natrium dipanaskan, menunjukkan bagaimana ion logam menghasilkan warna nyala api yang spesifik.
How difficult is Uji Nyala Natrium?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Uji Nyala Natrium?
Key safety precautions include: Wear safety goggles at all times; Keep hair tied back near open flames; Handle HCl with care — avoid skin contact.
What materials are needed for Uji Nyala Natrium?
The main materials required are: Sodium chloride (NaCl), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Uji Nyala Natrium?
A bright, persistent yellow-orange flame should appear immediately when the sodium chloride is introduced to the flame. The color is so intense that it can mask the colors of other metal ions present.