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Sudsy

Short answer: Soap is made by saponification, reacting fats or oils with a strong base to make fatty acid salts and glycerol. Each soap molecule has a water-attracting head and an oil-attracting tail.

In water the tails gather around grease and germs, forming micelles with the dirt inside, which rinse away. The footage shows microscope imagery.

VideoWrite-up2 sources

In collections:Everyday Physics

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What should you know about Sudsy?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. Soap is made by saponification.

    DD-345-F01 · Write-up · Exhibit A (Made by)

  2. The head is hydrophilic.

    DD-345-F02 · Write-up · Exhibit B (Head)

Video transcript: Sudsy: Soap Molecules Have One End That Loves Water and One That Loves Oil

Did you know? Soap cleans by a process called saponification, which involves breaking down fats and oils into fatty acid salts and glycerol. When you wash with soap, its molecules form structures called micelles that trap germs in grease within their hydrophobic centers. Soap molecules have a hydrophilic or water-attracting head and a hydrophobic or water -repelling tail. The hydrophobic tail binds to the oils and germs, while the hydrophilic head sticks to the water, allowing the entire micelle to be washed away, effectively removing germs from surfaces and skin. NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 29.3s Reel ·

Video coming soonSudsy · Instagram Reel
Sudsy: Soap Molecules Have One End That Loves Water and One That Loves Oil Instagram Reel · · 29.3s

The write-up

Soap molecules have one end that loves water and one that loves oil. Together they form micelles that wash away grime.

  1. Exhibit A

    Made by

    Soap is made by saponification.

  2. Exhibit B

    Head

    The head is hydrophilic.

  3. Exhibit C

    Tail

    The tail is hydrophobic.

  4. Exhibit D

    Micelles

    Micelles trap grease.

  5. Exhibit E

    Rinse

    Micelles wash away.

Questions people ask about Sudsy

How is soap made?

Fat plus base.

Source: Write-up · Exhibit A (Made by) · Wikipedia: Soap

What traps grease?

Clusters.

Source: Write-up · Exhibit B (Head) · Wikipedia: Soap

Which end likes water?

Hydrophilic.

Source: Write-up · Exhibit C (Tail) · Wikipedia: Soap

What does saponification also make?

Byproduct.

Source: Write-up · Exhibit D (Micelles) · Wikipedia: Micelle

What happens to micelles?

With water.

Source: Write-up · Exhibit E (Rinse) · Wikipedia: Micelle

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. How is soap made?

    1. Saponification
    2. Distillation
    3. Fermentation
    4. Smelting
    Show the answer

    Answer: A. Saponification Fat plus base. Source: Write-up · Exhibit A (Made by) · Wikipedia: Soap

  2. What traps grease?

    1. Micelles
    2. Bubbles only
    3. Salt
    4. Heat
    Show the answer

    Answer: A. Micelles Clusters. Source: Write-up · Exhibit B (Head) · Wikipedia: Soap

  3. Which end likes water?

    1. The head
    2. The tail
    3. Neither
    4. Both
    Show the answer

    Answer: A. The head Hydrophilic. Source: Write-up · Exhibit C (Tail) · Wikipedia: Soap

  4. What does saponification also make?

    1. Glycerol
    2. Gasoline
    3. Sugar
    4. Salt water
    Show the answer

    Answer: A. Glycerol Byproduct. Source: Write-up · Exhibit D (Micelles) · Wikipedia: Micelle

  5. What happens to micelles?

    1. They rinse away
    2. They burn
    3. They freeze
    4. They stick
    Show the answer

    Answer: A. They rinse away With water. Source: Write-up · Exhibit E (Rinse) · Wikipedia: Micelle

Cite this case file

Easterling, Marcus. "Sudsy." The Detail Department (DetailEnjoyer), case file DD-345, last updated Oct 15, 2024. https://detailenjoyer.com/case/sudsy/

Permalink: https://detailenjoyer.com/case/sudsy/ · Last updated

Markdown version

Cite a single fact by its ID, for example DD-345-F01 → https://detailenjoyer.com/case/sudsy/#DD-345-F01

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