1. Section 4:3
Mixtures

2. I. Properties of Mixtures
Mixture = a combination of 2 or more substances that are not chemically combined
Pizza = cheese, tomato sauce, pepperoni
Lemonade
Chex mix
Trail mix

3. C. Separating mixtures-physical means
B. No chemical change
each substance retains it chemical makeup
each substance keeps identity
see individual components or not
Salt water -NO
Pizza –YES
C. Separating mixtures-physical means
Heat
Distillation – separate based on boiling point
Magnet
Centifuge
Separate by densities

4. D. Ratio E. Compound vs mixtures chart on 100
Mixtures DO Not have to be mixed at a specific ratio
Granite = feldspar, mica, quartz
E. Compound vs mixtures
chart on 100

5. II. Solutions A. mixture that appears to be a single substance
1. composed of 2 or more particles evenly distributed
Same appearance and properties
B. Process to separate a mixture is dissolving

6. 1. SOLUTE- what is dissolved
2. SOLVENT- substance in which solute is dissolved
Solute must be soluble ( ability to dissolve)
Insoluble = not able to dissolve

7. C. Examples
Salt water= solute (salt) + solvent (water)
Anti-freeze = solute (alcohol) + solvent (water)
Soft drink = solute (carbonic acid) + solvent (water)
Brass = solute (zinc) + solvent (copper)

8. C. Examples
Alloys
solid solution of metals or non-metals dissolved in a metal

9. 1. So small that they never settle out
D. Particles
1. So small that they never settle out
Cannot be removed by filtering
Cannot scatter light

10. III. Concentration Of Solutions
A. Concentration is a measure of the solute dissolved
B. Solutions can be concentrated or dilute
Less solute = dilute
More solute = concentrate

11. C. Solubility
Ability for one solute to dissolve at a given temperature or pressure
Concentration =grams of solute
mL of solvent

12. Problems 1.) 35 grams salt and 175 mL of water
2.) 55 grams of sugar and 500 mL water
3.) 36 grams of and 144 mL water
Which is more concentrated?

13. D. Particles 1.