زراعة بلورات الشب

إنشاء بلورات شب شفافة كبيرة

Crystallization Beginner (Middle School) 30 دقيقة ~$6,00

الهدف

زراعة بلورات شب البوتاسيوم الكبيرة والشفافة الثمانية الوجوه من محلول مشبع فائق.

الخلفية

Potassium alum (KAl(SO₄)₂·12H₂O) crystallizes in a beautiful octahedral habit. It is non-toxic, inexpensive, and easy to grow into large crystals. The octahedral shape reflects the cubic crystal system of alum.

تحذيرات السلامة

  • Use care with hot water
  • Alum is generally safe but avoid ingestion of large amounts

معدات الوقاية الشخصية المطلوبة

goggles

المواد

  • Potassium alum (100 g)
    Food-grade available
  • Distilled water (300 mL)
    Hot
  • Thread or monofilament (30 cm)

المعدات

500 mL beaker Hot plate Stirring rod Pencil Filter paper

الإجراء

1

Heat 300 mL of distilled water to near boiling. Slowly dissolve as much alum as possible (about 80-100 g) while stirring.

10 دقيقة Handle hot liquids carefully
2

Filter the hot solution to remove any undissolved particles.

3 دقيقة
3

Pour a small amount into a dish and let it cool to form seed crystals overnight.

2 دقيقة
4

Select the best octahedral seed crystal. Tie it to thread and suspend in the main solution.

5 دقيقة
5

Cover loosely and store in a stable, cool location. Check daily.

2 دقيقة
6

After 1-2 weeks, remove the crystal, dry with a paper towel, and photograph the octahedral faces.

5 دقيقة

النتائج المتوقعة

Large, transparent, octahedral crystals up to 2-4 cm across after 1-2 weeks. The faces should be smooth and the crystal should be nearly colorless and transparent.

التنظيف

Alum solution can be saved for future crystal growing or disposed down the drain. Rinse beaker.

Frequently Asked Questions

What is the objective of زراعة بلورات الشب?
زراعة بلورات شب البوتاسيوم الكبيرة والشفافة الثمانية الوجوه من محلول مشبع فائق.
How difficult is زراعة بلورات الشب?
This experiment is rated as Beginner (Middle School). It takes approximately 30 minutes to complete.
What safety precautions are needed for زراعة بلورات الشب?
Key safety precautions include: Use care with hot water; Alum is generally safe but avoid ingestion of large amounts.
What materials are needed for زراعة بلورات الشب?
The main materials required are: Potassium alum, Distilled water, Thread or monofilament.
What results should I expect from زراعة بلورات الشب?
Large, transparent, octahedral crystals up to 2-4 cm across after 1-2 weeks. The faces should be smooth and the crystal should be nearly colorless and transparent.