Question

Explain how soap removes oil from a fabric.

   Explain how soap removes oil from a fabric.

General Chemistry

General Chemistry

Darrell Ebbing,… 9th Edition

Chapter 12, Problem 20

Instant Answer

Solved by Expert Lottie Adams

06/25/2021

Step 1

Soap is a surfactant, which means it has a unique molecular structure with one end being hydrophilic (water-attracting) and the other end being hydrophobic (water-repelling). Show more…

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Explain how soap removes oil from a fabric.

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Key Concepts

Micelle Formation

In water, amphiphilic molecules come together to form micelles—small, spherical structures where the hydrophobic parts congregate in the center and the hydrophilic parts face outward. This configuration allows the soap to encapsulate oil molecules within the center of the micelle, effectively trapping them in a water-soluble environment.

Emulsification

Emulsification is the process by which oil is dispersed into smaller droplets in water, usually aided by an emulsifier like soap. This process stabilizes the mixture and prevents the oil from recombining, which is crucial for washing it away from surfaces such as fabric.

Interaction with Surfaces

When applied to a fabric, soap molecules interact with the oil present by forming micelles around the oil droplets. This encapsulation lifts the oil away from the fabric, allowing it to be rinsed off with water and resulting in a cleaner material.

Amphiphilic Molecules

These are molecules that contain both hydrophilic (water-attracting) and hydrophobic (oil-attracting) parts. This dual characteristic allows them to interact effectively with both water and oil, which is essential in the cleaning process by enabling the molecule to connect with oil molecules on one side and water on the other.

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