1. II III I Mixtures

2. A. Definitions  Mixture = Variable combination of 2 or more pure substances. HeterogeneousHomogeneous

3. A. Definitions  Mixtures Composition is not fixed Can be separated by physical actions ++=

4. II III I Types of Mixtures

5. A. Definitions  1. Solution -  1. Solution - homogeneous mixture Solvent Solvent – dissolving medium Solute Solute - substance being dissolved

6. B. Mixtures  Gases can also mix with liquids  Gases are usually dissolved in water  Examples are carbonated drinks Homogeneous mixtures (solutions) Contain sugar, flavorings and carbon dioxide dissolved in water

7. B. Mixtures  Solution homogeneous very small particles <2nm no Tyndall effect Tyndall Effect particles don’t settle EX: rubbing alcohol

8. B. Mixtures  2. Colloid medium-sized particles 2-1000nm Tyndall effect particles don’t settle EX: milk

9. Copyright©2000 by Houghton Mifflin Company. All rights reserved.9 Colloidal Dispersion (colloid): A suspension of tiny particles in some medium. Suspended particles range from 1 to 1000 nm. Types of Colloids include: aerosols, foams, emulsions, sols (See Table on p. 550)

10. Copyright©2000 by Houghton Mifflin Company. All rights reserved.10 COLLOIDS  TYNDALL EFFECT: -- SCATTERING OF LIGHT BY PARTICLES IN A COLLOID. -- BEAM OF LIGHT VISIBLE THROUGH A COLLOID BUT INVISIBLE THROUGH A TRUE SOLUTION.

11. B. Mixtures  3. Suspension large particles >1000nm particles settle EX:fresh-squeezed lemonade

12. B. Mixtures  Examples: mayonnaise muddy water fog saltwater Italian salad dressing colloid suspension colloid true solution suspension