اختبار لهب السترونشيوم

تعرف على السترونشيوم من خلال لهبه الأحمر القاني

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

الهدف

لاحظ اللهب الأحمر القاني الساطع الناتج عن أيونات السترونشيوم، المستخدم عادةً في الألعاب النارية الحمراء والشعلات الطارئة.

الخلفية

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.

تحذيرات السلامة

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

معدات الوقاية الشخصية المطلوبة

goggles lab_coat

المواد

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

المعدات

Bunsen burner Nichrome wire loop Watch glass Forceps

الإجراء

1

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

2 دقيقة
2

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

1 دقيقة
3

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

2 دقيقة
4

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

2 دقيقة
5

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

1 دقيقة

النتائج المتوقعة

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.

التنظيف

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

Frequently Asked Questions

What is the objective of اختبار لهب السترونشيوم?
لاحظ اللهب الأحمر القاني الساطع الناتج عن أيونات السترونشيوم، المستخدم عادةً في الألعاب النارية الحمراء والشعلات الطارئة.
How difficult is اختبار لهب السترونشيوم?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for اختبار لهب السترونشيوم?
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 اختبار لهب السترونشيوم?
The main materials required are: Strontium chloride (SrCl₂), Hydrochloric acid (HCl), Distilled water.
What results should I expect from اختبار لهب السترونشيوم?
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.