Стронциевый пламенный тест

Определение стронция по ярко-алому пламени

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

Цель

Наблюдать ярко-алое пламя ионов стронция, широко применяемое в красных фейерверках и аварийных факелах.

Предпосылки

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.

Предупреждения по безопасности

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

Требуемые СИЗ

goggles lab_coat

Материалы

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

Оборудование

Bunsen burner Nichrome wire loop Watch glass Forceps

Процедура

1

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

2 мин
2

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

1 мин
3

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

2 мин
4

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

2 мин
5

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

1 мин

Ожидаемые результаты

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.

Уборка

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

Детали

Категория
Flame Tests
Сложность
Beginner (Middle School)
Продолжительность
15 мин
Прим. стоимость
$10,00
Шаги
5
Материалы
3

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Frequently Asked Questions

What is the objective of Стронциевый пламенный тест?
Наблюдать ярко-алое пламя ионов стронция, широко применяемое в красных фейерверках и аварийных факелах.
How difficult is Стронциевый пламенный тест?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for Стронциевый пламенный тест?
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 Стронциевый пламенный тест?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from Стронциевый пламенный тест?
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.