Laboratório de Comparação de Testes de Chama

Teste de múltiplos metais para criar uma tabela de referência de cores de chama

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

Objetivo

Realizar testes de chama em seis sais metálicos diferentes para criar uma tabela de referência das cores de chama características para análise qualitativa.

Contexto

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.

Avisos de segurança

  • 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

EPI necessário

goggles gloves lab_coat

Materiais

  • 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

Equipamentos

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

Procedimento

1

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

3 min 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 min
3

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

3 min
4

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

3 min
5

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

4 min
6

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

3 min
7

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

3 min
8

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

3 min
9

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

5 min

Resultados esperados

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.

Limpeza

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.

Detalhes

Categoria
Flame Tests
Dificuldade
Intermediate (High School)
Duração
45 min
Custo estimado
$25,00
Passos
9
Materiais
8

Mais experimentos

Teste de Chama do Bário 20 min Teste de Chama do Cálcio 15 min Teste de Chama do Cobre 15 min Teste de Chama do Estrôncio 15 min Teste de Chama do Lítio 15 min Teste de Chama do Potássio 20 min Teste de Chama do Sódio 15 min

Frequently Asked Questions

What is the objective of Laboratório de Comparação de Testes de Chama?
Realizar testes de chama em seis sais metálicos diferentes para criar uma tabela de referência das cores de chama características para análise qualitativa.
How difficult is Laboratório de Comparação de Testes de Chama?
This experiment is rated as Intermediate (High School). It takes approximately 45 minutes to complete.
What safety precautions are needed for Laboratório de Comparação de Testes de Chama?
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 Laboratório de Comparação de Testes de Chama?
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 Laboratório de Comparação de Testes de Chama?
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.