Laboratorium Perbandingan Uji Nyala

Menguji beberapa logam untuk membuat grafik referensi warna nyala api

Flame Tests Intermediate (High School) 45 menit ~$25,00

Tujuan

Lakukan uji nyala pada enam garam logam yang berbeda untuk membuat grafik referensi warna nyala api khas untuk analisis kualitatif.

Latar Belakang

This comprehensive flame test lab tests multiple metal salts side by side, building a reference chart that students can use for unknown identification. By comparing the flame colors of lithium, sodium, potassium, calcium, strontium, and copper directly, students develop the observational skills needed for qualitative chemical analysis.

Peringatan Keselamatan

  • Wear safety goggles at all times
  • Wear gloves when handling copper chloride
  • Handle HCl with care — avoid contact with skin
  • Keep hair tied back near open flames
  • Clean wire between each test to prevent cross-contamination

APD yang Diperlukan

goggles gloves lab_coat

Bahan

  • Lithium chloride (LiCl) (0.5 g)
  • Sodium chloride (NaCl) (0.5 g)
  • Potassium chloride (KCl) (0.5 g)
  • Calcium chloride (CaCl₂) (0.5 g)
  • Strontium chloride (SrCl₂) (0.5 g)
  • Copper(II) chloride (CuCl₂) (0.5 g)
    Toxic
  • Hydrochloric acid (HCl) (50 mL)
    1M concentration
  • Cobalt blue glass (1 piece)
    For potassium identification

Peralatan

Bunsen burner Nichrome wire loop 6 labeled watch glasses Forceps Lab notebook

Prosedur

1

Prepare six labeled watch glasses, each containing a small amount of one metal salt.

3 menit Wear gloves for copper chloride
2

Clean the nichrome wire thoroughly by repeatedly dipping in HCl and heating until the flame shows no color.

3 menit
3

Test lithium chloride first. Dip wire in HCl, then into the salt, and hold in the flame. Record the crimson-red color.

3 menit
4

Clean the wire thoroughly. Test sodium chloride and record the bright yellow flame.

3 menit
5

Clean the wire. Test potassium chloride. Observe with naked eye, then through cobalt blue glass. Record the lilac/violet color.

4 menit
6

Clean the wire. Test calcium chloride and record the orange-red flame.

3 menit
7

Clean the wire. Test strontium chloride and record the scarlet-red flame.

3 menit
8

Clean the wire. Test copper(II) chloride and record the blue-green flame.

3 menit
9

Create a complete reference chart organizing the metals by flame color from red through yellow to green and violet.

5 menit

Hasil yang Diharapkan

A complete flame color reference chart: Li (crimson-red), Sr (scarlet-red), Ca (orange-red), Na (yellow), Ba (yellow-green if tested), Cu (blue-green), K (lilac/violet through cobalt glass). Each color should be distinguishable from the others.

Pembersihan

Clean the wire with HCl. Dispose of copper waste in the heavy metal waste container. Dispose of remaining salts per lab protocol. Clean and dry all watch glasses.

Detail

Kategori
Flame Tests
Tingkat Kesulitan
Intermediate (High School)
Durasi
45 menit
Perkiraan Biaya
$25,00
Langkah
9
Bahan
8

Eksperimen Lainnya

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 Uji Nyala Tembaga 15 min

Frequently Asked Questions

What is the objective of Laboratorium Perbandingan Uji Nyala?
Lakukan uji nyala pada enam garam logam yang berbeda untuk membuat grafik referensi warna nyala api khas untuk analisis kualitatif.
How difficult is Laboratorium Perbandingan Uji Nyala?
This experiment is rated as Intermediate (High School). It takes approximately 45 minutes to complete.
What safety precautions are needed for Laboratorium Perbandingan Uji Nyala?
Key safety precautions include: Wear safety goggles at all times; Wear gloves when handling copper chloride; Handle HCl with care — avoid contact with skin.
What materials are needed for Laboratorium Perbandingan Uji Nyala?
The main materials required are: Lithium chloride (LiCl), Sodium chloride (NaCl), Potassium chloride (KCl), Calcium chloride (CaCl₂), Strontium chloride (SrCl₂).
What results should I expect from Laboratorium Perbandingan Uji Nyala?
A complete flame color reference chart: Li (crimson-red), Sr (scarlet-red), Ca (orange-red), Na (yellow), Ba (yellow-green if tested), Cu (blue-green), K (lilac/violet through cobalt glass). Each color should be distinguishable from the others.