Test de Flamme au Strontium

Identification du strontium par sa flamme rouge écarlate

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

Objectif

Observer la brillante flamme rouge écarlate produite par les ions strontium, couramment utilisée dans les feux d'artifice rouges et les fusées de détresse.

Contexte

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.

Avertissements de sécurité

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

EPI requis

goggles lab_coat

Matériaux

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

Équipement

Bunsen burner Nichrome wire loop Watch glass Forceps

Procédure

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

Résultats attendus

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.

Nettoyage

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

Détails

Catégorie
Flame Tests
Difficulté
Beginner (Middle School)
Durée
15 min
Coût estimé
$10,00
Étapes
5
Matériaux
3

Plus d'expériences

Laboratoire de Comparaison des Tests de Flamme 45 min Test de Flamme au Baryum 20 min Test de Flamme au Calcium 15 min Test de Flamme au Cuivre 15 min Test de Flamme au Lithium 15 min Test de Flamme au Potassium 20 min Test de Flamme au Sodium 15 min

Frequently Asked Questions

What is the objective of Test de Flamme au Strontium?
Observer la brillante flamme rouge écarlate produite par les ions strontium, couramment utilisée dans les feux d'artifice rouges et les fusées de détresse.
How difficult is Test de Flamme au Strontium?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Test de Flamme au Strontium?
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 Test de Flamme au Strontium?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Test de Flamme au Strontium?
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.