锶焰色反应

通过深红色火焰鉴定锶

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

目标

观察锶离子产生的鲜艳深红色火焰，了解其在红色烟火和紧急信号弹中的应用。

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.

安全警告

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

所需PPE

goggles lab_coat

材料

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

设备

Bunsen burner Nichrome wire loop Watch glass Forceps

步骤

1

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

2 分钟
2

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

1 分钟
3

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

2 分钟
4

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

2 分钟
5

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

1 分钟

预期结果

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.

清理

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

详情

类别
Flame Tests
难度
Beginner (Middle School)
时长
15 分钟
预估费用
$10.00
步骤数
5
材料
3

更多实验

焰色反应对比实验 45 min 钙焰色反应 15 min 钠焰色反应 15 min 钡焰色反应 20 min 钾焰色反应 20 min 铜焰色反应 15 min 锂焰色反应 15 min

Frequently Asked Questions

What is the objective of 锶焰色反应?
观察锶离子产生的鲜艳深红色火焰，了解其在红色烟火和紧急信号弹中的应用。
How difficult is 锶焰色反应?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for 锶焰色反应?
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 锶焰色反应?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from 锶焰色反应?
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.