1. Solutions

2. Solution, Suspension, Colloid Timberlake, Chemistry 7 th Edition, page 309

3. With a solution, the particles are very small (too small to be seen with the naked eye) and are dissolved between the molecules of the solvent (in the interstitial spaces). With a colloid, the particles are still small enough to fit in the interstitial spaces, but are large enough to be seen with the naked eye. Both a solution and a colloid are homogeneous mixtures. In a suspension, the particles are not dissolved in the solution, they are too large to fit in the interstitial spaces. Instead, they are stirred up and suspended in the solvent for short periods of time. Suspensions settle out when allowed to stand undisturbed. The main difference is in PARTICLE SIZE. Solution, Suspension, Colloid

4. Copyright © 2007 Pearson Benjamin Cummings. All rights reserved.

5. Tyndall Effect Put a beam of light through a mixture Reflection of light off undissolved particles A) Solution - no Tyndall effect- can’t see the beam B) Suspensions - sparkle off big particles C) Colloids – continuous beam A B C

6. The Tyndal Effect The Artificial Sunset Colloidal sulfur is produced when sulfuric acid is added to a solution of sodium thiosulfate. Tyndal effect

7. Solution

8. Colloid

9. Suspension