Key Idea.
Section 1
The Peacemaker Molecule
So, how do we get oil and vinegar to stay mixed in a creamy salad dressing? We need a special ingredient called an emulsifier.
An emulsifier is a substance that acts like a peacemaker. Examples include egg yolks or mustard. These substances contain special molecules that can talk to both sides—the oil and the vinegar.
Section 2
Building a Bridge
An emulsifier molecule is unique because it has two different ends. One end loves oil (it is attracted to it), and the other end loves water (it is attracted to it).
This allows the molecule to act as a bridge. It grabs an oil droplet with one hand and a water molecule with the other. By linking them together, the emulsifier stops the liquids from separating.
Section 3
Creating Stability
When you add an emulsifier, you create a stable mixture called an emulsion.
The emulsifier surrounds the tiny oil droplets, preventing them from clumping back together. This keeps the oil evenly spread through the vinegar. A strong emulsifier creates a mixture with high stability, meaning it will stay creamy and mixed for a long time without separating.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter
Expand to review the lesson summary and core properties.
Section 1
The Peacemaker Molecule
So, how do we get oil and vinegar to stay mixed in a creamy salad dressing? We need a special ingredient called an emulsifier.
An emulsifier is a substance that acts like a peacemaker. Examples include egg yolks or mustard. These substances contain special molecules that can talk to both sides—the oil and the vinegar.
Section 2
Building a Bridge
An emulsifier molecule is unique because it has two different ends. One end loves oil (it is attracted to it), and the other end loves water (it is attracted to it).
This allows the molecule to act as a bridge. It grabs an oil droplet with one hand and a water molecule with the other. By linking them together, the emulsifier stops the liquids from separating.
Section 3
Creating Stability
When you add an emulsifier, you create a stable mixture called an emulsion.
The emulsifier surrounds the tiny oil droplets, preventing them from clumping back together. This keeps the oil evenly spread through the vinegar. A strong emulsifier creates a mixture with high stability, meaning it will stay creamy and mixed for a long time without separating.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter