عمود كثافة قوس قزح

تكديس سوائل بكثافات مختلفة لإنشاء عمود ملون

Classroom Demonstrations Beginner (Middle School) 30 دقيقة ~$8,00

الهدف

إظهار مفهوم كثافة السائل بطبقات السوائل غير القابلة للامتزاج بكثافات مختلفة في عمود طويل.

الخلفية

Different liquids have different densities, and immiscible liquids will arrange themselves with the densest at the bottom and the least dense at the top. By carefully layering liquids such as honey, corn syrup, dish soap, water, vegetable oil, and rubbing alcohol, a dramatic rainbow column can be created. Small solid objects placed in the column float at the interface matching their density, further illustrating the concept.

تحذيرات السلامة

  • Rubbing alcohol is flammable — no open flames
  • Some liquids are sticky — clean spills immediately
  • Do not drink any of the layered liquids

معدات الوقاية الشخصية المطلوبة

goggles

المواد

  • Honey (50 mL)
    Density ≈ 1.42 g/mL
  • Corn syrup (50 mL)
    Density ≈ 1.38 g/mL
  • Maple syrup (50 mL)
    Density ≈ 1.32 g/mL
  • Dish soap (50 mL)
    Density ≈ 1.06 g/mL
  • Water (dyed blue) (50 mL)
    Density = 1.00 g/mL
  • Vegetable oil (50 mL)
    Density ≈ 0.92 g/mL
  • Rubbing alcohol (dyed red) (50 mL)
    Density ≈ 0.79 g/mL
  • Food coloring (Various)
    To distinguish water and alcohol layers

المعدات

Tall clear glass or graduated cylinder (500 mL) Funnel or turkey baster Small objects: grape, cherry tomato, ping pong ball, bolt, cork

الإجراء

1

Start with the densest liquid: pour honey slowly into the bottom of the tall glass.

2 دقيقة
2

Tilt the glass slightly and pour corn syrup slowly down the side. It should form a distinct layer on top of the honey.

3 دقيقة
3

Continue adding layers in order of decreasing density: maple syrup, dish soap, blue-dyed water, vegetable oil, and red-dyed rubbing alcohol.

15 دقيقة Pour very slowly for clean layers
4

Observe the distinct layers. Gently drop small objects (grape, bolt, cork, ping pong ball) into the column and note where they settle.

5 دقيقة
5

Discuss why the layers form (density differences), why some are miscible and some immiscible, and why objects float at specific levels.

5 دقيقة

النتائج المتوقعة

Seven distinct layers should be visible, creating a colorful rainbow column. A metal bolt sinks to the bottom, a grape rests on the corn syrup, a cherry tomato on the dish soap, and a ping pong ball floats on top. Cork floats on the water layer.

التنظيف

Pour the column into a waste container (do not pour down the drain due to oil and syrup). Wash the glass with hot soapy water.

التفاصيل

الفئة
Classroom Demonstrations
الصعوبة
Beginner (Middle School)
المدة
30 دقيقة
التكلفة التقديرية
$8,00
الخطوات
5
المواد
8

مزيد من التجارب

التجميد الفوري: الماء المبرد فائقاً 120 min الكأس المختفي (توافق معامل الانكسار) 15 min الكيمياء الضوئية مع اللومينول 30 min تفاعل الثيرميت 30 min تفاعل الصوديوم مع الماء 25 min تفاعل بريغز-راوشر المتذبذب 40 min تفاعل ساعة اليود 45 min حرق المغنيسيوم في الجليد الجاف 25 min سائل غير نيوتوني: أوبليك 20 min معجون أسنان الفيل 20 min

Frequently Asked Questions

What is the objective of عمود كثافة قوس قزح?
إظهار مفهوم كثافة السائل بطبقات السوائل غير القابلة للامتزاج بكثافات مختلفة في عمود طويل.
How difficult is عمود كثافة قوس قزح?
This experiment is rated as Beginner (Middle School). It takes approximately 30 minutes to complete.
What safety precautions are needed for عمود كثافة قوس قزح?
Key safety precautions include: Rubbing alcohol is flammable — no open flames; Some liquids are sticky — clean spills immediately; Do not drink any of the layered liquids.
What materials are needed for عمود كثافة قوس قزح?
The main materials required are: Honey, Corn syrup, Maple syrup, Dish soap, Water (dyed blue).
What results should I expect from عمود كثافة قوس قزح?
Seven distinct layers should be visible, creating a colorful rainbow column. A metal bolt sinks to the bottom, a grape rests on the corn syrup, a cherry tomato on the dish soap, and a ping pong ball floats on top. Cork floats on the water layer.