カルシウム炎色反応

橙赤色の炎でカルシウムを同定する

Flame Tests Beginner (Middle School) 15 分 ~$5.00

目的

カルシウムイオンが生じるレンガ色から橙赤色の炎を観察する。カルシウムは石灰岩・大理石・骨に含まれる一般的な元素である。

背景

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.

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

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

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

2 分

予想される結果

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.

後片付け

Clean the 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
$5.00
ステップ数
4
材料
3

その他の実験

カリウム炎色反応 20 min ストロンチウム炎色反応 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 カルシウム炎色反応?
カルシウムイオンが生じるレンガ色から橙赤色の炎を観察する。カルシウムは石灰岩・大理石・骨に含まれる一般的な元素である。
How difficult is カルシウム炎色反応?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for カルシウム炎色反応?
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 カルシウム炎色反応?
The main materials required are: Calcium chloride (CaCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from カルシウム炎色反応?
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.