Thử Nghiệm Ngọn Lửa Canxi

Nhận biết canxi qua ngọn lửa cam-đỏ

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

Mục tiêu

Quan sát ngọn lửa đỏ gạch đến cam-đỏ do các ion canxi tạo ra, một nguyên tố phổ biến trong đá vôi, đá cẩm thạch và xương.

Bối cảnh

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.

Cảnh báo an toàn

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

PPE cần thiết

goggles lab_coat

Vật liệu

  • Calcium chloride (CaCl₂) (1 g)
    Common road de-icer
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

Thiết bị

Bunsen burner Nichrome wire loop Watch glass Forceps

Quy trình

1

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

2 phút
2

Place calcium chloride on the watch glass and collect a sample on the clean wire.

1 phút
3

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

2 phút
4

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

2 phút

Kết quả dự kiến

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.

Dọn dẹp

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

Frequently Asked Questions

What is the objective of Thử Nghiệm Ngọn Lửa Canxi?
Quan sát ngọn lửa đỏ gạch đến cam-đỏ do các ion canxi tạo ra, một nguyên tố phổ biến trong đá vôi, đá cẩm thạch và xương.
How difficult is Thử Nghiệm Ngọn Lửa Canxi?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Thử Nghiệm Ngọn Lửa Canxi?
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 Thử Nghiệm Ngọn Lửa Canxi?
The main materials required are: Calcium chloride (CaCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Thử Nghiệm Ngọn Lửa Canxi?
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.