COLLOIDS

What is a colloid?

 A colloid is when one substance is divided into small particles.

Colloids are hetrogenous mixtures. For example:

1. Foam-gas in liquid

2. Gel-liquid in solid 

3. Sol-solid in liquid

4. Emulsion-liquid in liquid

5. Smoke-solid in gas

6. Fog-liquid in gas 

What is a hetrogeneous mixture?

Is a substance in which compounds are not evenly mixed. For example-salad dressing, sandy water, carbonated drinks, pulpy orange juice and chicken noodle soup.

What is a homogeneous mixture?

Is a substance in which components are evenly mixed.

For example-toothpaste, perfume, milk, hard alcohol, wine, salty water, brewed tea or coffee.

Difference between a suspension and a colloid.

Colloid particles do not settle out and a suspension is a hetrogeneous mixture, which means that it is not mixed up  very well.

How does a solution differ from a colloid?

A solution is a well mixed mixture and the particles are small dissoled where colloids are not mixed up well. 

Websites on colloids:

http://en.wikipedia.org/wiki/Colloid