밀도 컬럼 무지개

밀도가 다른 액체를 쌓아 화려한 컬럼 만들기

Classroom Demonstrations Beginner (Middle School) 30 분 ~$8.00

목표

높은 용기에 밀도가 다른 비혼화성 액체를 층층이 쌓아 액체 밀도의 개념을 실증한다.

배경

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.

안전 경고

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

필수 개인 보호 장비

goggles

재료

  • 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

장비

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

실험 절차

1

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

2 분
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 분
3

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

15 분 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 분
5

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

5 분

예상 결과

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.

정리

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.

세부 정보

카테고리
Classroom Demonstrations
난이도
Beginner (Middle School)
소요 시간
30 분
예상 비용
$8.00
단계
5
재료
8

더 많은 실험

드라이아이스 속 마그네슘 연소 25 min 진동하는 브릭스-라우처 반응 40 min 나트륨과 물의 반응 25 min 아이오딘 시계 반응 45 min 사라지는 비커(굴절률 매칭) 15 min 코끼리 치약 20 min 테르밋 반응 30 min 루미놀 화학발광 30 min 비뉴턴 유체: 우블렉 20 min 순간 냉동: 과냉각수 120 min

Frequently Asked Questions

What is the objective of 밀도 컬럼 무지개?
높은 용기에 밀도가 다른 비혼화성 액체를 층층이 쌓아 액체 밀도의 개념을 실증한다.
How difficult is 밀도 컬럼 무지개?
This experiment is rated as Beginner (Middle School). It takes approximately 30 minutes to complete.
What safety precautions are needed for 밀도 컬럼 무지개?
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 밀도 컬럼 무지개?
The main materials required are: Honey, Corn syrup, Maple syrup, Dish soap, Water (dyed blue).
What results should I expect from 밀도 컬럼 무지개?
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.