Test de Flamme au Calcium

Identification du calcium par sa flamme orange-rouge

Flame Tests Beginner (Middle School) 15 min ~$5,00

Objectif

Observer la flamme rouge brique à orange-rouge produite par les ions calcium, un élément commun dans le calcaire, le marbre et les os.

Contexte

Calcium produces a distinctive brick-red to orange-red flame color. The emission results from electronic transitions in calcium atoms excited by the flame energy. Calcium is one of the most abundant elements in the Earth's crust and its flame test is a useful diagnostic tool in mineral identification.

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

  • Calcium chloride (CaCl₂) (1 g)
    Common road de-icer
  • 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 calcium chloride on the watch glass and collect 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

Record the brick-red to orange-red color and note how it differs from strontium and lithium.

2 min

Résultats attendus

A brick-red to orange-red flame should appear. The color is less vivid than strontium's scarlet and more orange than lithium's crimson. Calcium's flame is moderate in intensity.

Nettoyage

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

Détails

Catégorie
Flame Tests
Difficulté
Beginner (Middle School)
Durée
15 min
Coût estimé
$5,00
Étapes
4
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 Cuivre 15 min Test de Flamme au Lithium 15 min Test de Flamme au Potassium 20 min Test de Flamme au Sodium 15 min Test de Flamme au Strontium 15 min

Frequently Asked Questions

What is the objective of Test de Flamme au Calcium?
Observer la flamme rouge brique à orange-rouge produite par les ions calcium, un élément commun dans le calcaire, le marbre et les os.
How difficult is Test de Flamme au Calcium?
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 Calcium?
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 Calcium?
The main materials required are: Calcium chloride (CaCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Test de Flamme au Calcium?
A brick-red to orange-red flame should appear. The color is less vivid than strontium's scarlet and more orange than lithium's crimson. Calcium's flame is moderate in intensity.