Uji Nyala Litium

Mengidentifikasi litium dari nyala api merah kirmizi

Flame Tests Beginner (Middle School) 15 menit ~$8,00

Tujuan

Amati warna nyala api merah kirmizi khas yang dihasilkan oleh ion litium, dan bandingkan dengan uji nyala logam alkali lainnya.

Latar Belakang

Lithium produces a distinctive crimson-red flame when heated. The emission occurs primarily at 670.8 nm as the excited 2s electron returns to the ground state. Lithium compounds were historically used to produce red colors in fireworks before the introduction of strontium-based alternatives.

Peringatan Keselamatan

  • Wear safety goggles at all times
  • Keep hair tied back near open flames
  • Handle HCl with care

APD yang Diperlukan

goggles lab_coat

Bahan

  • Lithium chloride (LiCl) (1 g)
  • 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 is visible in the flame.

2 menit
2

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

1 menit
3

Dip the clean wire into HCl, then touch it to the lithium chloride sample.

1 menit
4

Hold the wire in the Bunsen burner flame and observe the characteristic crimson-red color.

2 menit Keep face away from flame
5

Record observations and compare with the sodium flame test if already performed.

1 menit

Hasil yang Diharapkan

A bright crimson-red flame should appear. The color is distinct from the red produced by strontium (which is more scarlet) and potassium (which is lilac/violet).

Pembersihan

Clean the wire loop with HCl. Dispose of chemicals per lab protocol.

Detail

Kategori
Flame Tests
Tingkat Kesulitan
Beginner (Middle School)
Durasi
15 menit
Perkiraan Biaya
$8,00
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 Natrium 15 min Uji Nyala Stronsium 15 min Uji Nyala Tembaga 15 min

Frequently Asked Questions

What is the objective of Uji Nyala Litium?
Amati warna nyala api merah kirmizi khas yang dihasilkan oleh ion litium, dan bandingkan dengan uji nyala logam alkali lainnya.
How difficult is Uji Nyala Litium?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Uji Nyala Litium?
Key safety precautions include: Wear safety goggles at all times; Keep hair tied back near open flames; Handle HCl with care.
What materials are needed for Uji Nyala Litium?
The main materials required are: Lithium chloride (LiCl), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Uji Nyala Litium?
A bright crimson-red flame should appear. The color is distinct from the red produced by strontium (which is more scarlet) and potassium (which is lilac/violet).