ストロンチウム炎色反応

深紅色の炎でストロンチウムを同定する

Flame Tests Beginner (Middle School) 15 分 ~$10.00

目的

ストロンチウムイオンが生じる明るい深紅色の炎を観察し、赤色花火や緊急信号灯への応用を理解する。

背景

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.

安全上の警告

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

必要なPPE

goggles lab_coat

材料

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

器具

Bunsen burner Nichrome wire loop Watch glass Forceps

手順

1

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

2 分
2

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

1 分
3

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

2 分
4

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

2 分
5

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

1 分

予想される結果

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.

後片付け

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

詳細

カテゴリ
Flame Tests
難易度
Beginner (Middle School)
所要時間
15 分
推定費用
$10.00
ステップ数
5
材料
3

その他の実験

カリウム炎色反応 20 min カルシウム炎色反応 15 min ナトリウム炎色反応 15 min バリウム炎色反応 20 min リチウム炎色反応 15 min 炎色反応比較実験 45 min 銅炎色反応 15 min

Frequently Asked Questions

What is the objective of ストロンチウム炎色反応?
ストロンチウムイオンが生じる明るい深紅色の炎を観察し、赤色花火や緊急信号灯への応用を理解する。
How difficult is ストロンチウム炎色反応?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for ストロンチウム炎色反応?
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 ストロンチウム炎色反応?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from ストロンチウム炎色反応?
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.