Thử Nghiệm Ngọn Lửa Stronti

Nhận biết stronti qua ngọn lửa đỏ tươi

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

Mục tiêu

Quan sát ngọn lửa đỏ tươi sáng do các ion stronti tạo ra, thường được sử dụng trong pháo hoa đỏ và pháo hiệu khẩn cấp.

Bối cảnh

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.

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

  • Strontium chloride (SrCl₂) (1 g)
  • 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 strontium chloride on the watch glass and pick up 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

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

2 phút
5

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

1 phút

Kết quả dự kiến

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.

Dọn dẹp

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

Frequently Asked Questions

What is the objective of Thử Nghiệm Ngọn Lửa Stronti?
Quan sát ngọn lửa đỏ tươi sáng do các ion stronti tạo ra, thường được sử dụng trong pháo hoa đỏ và pháo hiệu khẩn cấp.
How difficult is Thử Nghiệm Ngọn Lửa Stronti?
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 Stronti?
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 Stronti?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Thử Nghiệm Ngọn Lửa Stronti?
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.