Teste de Chama do Estrôncio

Identificação do estrôncio pela sua chama vermelho escarlate

Flame Tests Beginner (Middle School) 15 min ~$10,00

Objetivo

Observar a brilhante chama vermelho escarlate produzida pelos íons de estrôncio, comumente usada em fogos de artifício vermelhos e sinalizadores de emergência.

Contexto

Strontium compounds produce a vivid scarlet-red flame when heated, with primary emission lines at 460.7 nm and 707.0 nm. This distinctive red is widely used in pyrotechnics for red fireworks, road flares, and military signal flares. Strontium's flame color is more brilliant and more orange-red compared to lithium's deeper crimson.

Avisos de segurança

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

EPI necessário

goggles lab_coat

Materiais

  • Strontium chloride (SrCl₂) (1 g)
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

Equipamentos

Bunsen burner Nichrome wire loop Watch glass Forceps

Procedimento

1

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

2 min
2

Place strontium chloride on the watch glass and pick up a sample on the clean wire.

1 min
3

Hold the wire in the Bunsen burner flame and observe the flame color.

2 min
4

Compare the scarlet-red color with lithium (crimson) if previously tested.

2 min
5

Record observations noting intensity and hue differences from other red-producing elements.

1 min

Resultados esperados

A bright scarlet-red flame should appear, distinctly more orange-red than lithium's crimson. The color is vivid and persistent, easily distinguished from other metal flame colors.

Limpeza

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

Detalhes

Categoria
Flame Tests
Dificuldade
Beginner (Middle School)
Duração
15 min
Custo estimado
$10,00
Passos
5
Materiais
3

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Frequently Asked Questions

What is the objective of Teste de Chama do Estrôncio?
Observar a brilhante chama vermelho escarlate produzida pelos íons de estrôncio, comumente usada em fogos de artifício vermelhos e sinalizadores de emergência.
How difficult is Teste de Chama do Estrôncio?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Teste de Chama do Estrôncio?
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 Teste de Chama do Estrôncio?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Teste de Chama do Estrôncio?
A bright scarlet-red flame should appear, distinctly more orange-red than lithium's crimson. The color is vivid and persistent, easily distinguished from other metal flame colors.