1. Solutions Double, Double, Toil, and Trouble…

2. Kool Aid drinks are solutions  Solutions are homogenous mixtures of two or more pure substances in a single phase  Contains a solvent and solute Solvent: dissolving medium (water) Solvent: dissolving medium (water) Solute: dissolved substance (salt) Solute: dissolved substance (salt)  Particle sizes are the smallest  Will not separate while standing  Do not filter  Do not scatter light  Colligative properties are affected

3. Electrolytes  Some substances will conduct electricity when dissolved in water...these are called electrolytes.  Sodium, Potassium, and Calcium are electrolytes that are found in most sport drinks.  Used to transport nerve signals.

4. Solutions

5. Muddy water is a Suspension  Suspensions are heterogeneous mixtures that have the largest particles of all mixtures Will separate upon standing Will separate upon standing Can be filtered Can be filtered Do scatter light Do scatter light Colligative properties are unaffected Colligative properties are unaffected Examples: Muddy water, Cu Lab. Examples: Muddy water, Cu Lab.

6. Suspensions

7. Milk/Gelatins are Colloids  Colloids are homogeneous mixtures that have particles that are medium in size.  Particles remain dispersed in liquid due to random particle motion of surrounding molecules. Will separate very slowly or not at all Will separate very slowly or not at all Will not filter Will not filter Will scatter light Will scatter light Colligative properties are unaffected. Colligative properties are unaffected.

8. Eggs Are Colloids  The proteins in the egg white are large enough to scatter light, but mix well in water.  This only occurs when the eggs are put into water RAW!!

9. I Like Raw Eggs

10. What is this scattering light?

11. Tyndall Effect  Light bounces off objects it cannot pass through, is scattered by objects, or passes right through objects.  The scattering of light as it passes through a transparent medium is called the Tyndall Effect.

12.  When focused light is shined on a homogeneous solution the light will not be scattered; it will pass right through.  When focused light is shined on a colloid the light will be scattered and no longer as focused.

13. What are they?  Oil and vinegar salad dressing?  Gelatin?  Starch in water?  Smoke in air?  Salt in water?  Clay in water?  Food coloring in water?

14.  Carbon dioxide in water?  Steam in air?  Table sugar in water?  Milk?  Bleach?  Ammonia?  Tea?