1. TOPIC: Solutions and Solubility Do Now: check out test grades

2. Classification of Matter
Pure
Substances
Mixtures
Homogeneous
Heterogeneous
Elements
Compounds
VIDEO

3. Mixtures – can be separated by physical means
Heterogeneous Mixture: See visibly different regions
Particles random
Settles upon standing
Scatters light (it doesn’t shine through)
Homogenous Mixture (aka SOLUTION): particles too small to see
Particles evenly distributed
Particles do not settle
-translucent (light shines through)

4. CuSO4(aq)

5. Not everything dissolves in water
Water is often used as a solvent
Not everything dissolves in water
Soluble = dissolves in water = aq
Insoluble = doesn’t dissolve in water
Miscible = 2 liquids that dissolve
Immiscible = 2 liquids that don’t dissolve

6. How can you tell….?!!!?? Like Dissolve Like
Water is polar, so most polar compounds will dissolve in water
Things that dissolve in water
Soluble ionic compounds – use Table F
Acids - start with H except H2O H2O2
ex HCl
Bases - metal + OH and NH3
ex. NaOH
Polar covalent molecules
Remember polar = asymmetrical = poles
nonpolar = symmetrical = no poles

7. Determining if an ionic compound is soluble (aq) or NOT
LOOK AT TABLE F
LiOH
Cu(NO3)2
AgCl2
MgS
NaS2
KOH aq
Insoluble = s

8. Solubility = the max amount of solute that can be dissolved in a solvent
Many solids and gases dissolve in water
As you increase the temperature, you can dissolve more solid
Does this work the same with gas?
NOT the same for gases – as you increase temp, gas molecules KE
To get gases dissolve, decrease temperature and increase pressure

9. Summary: Factors Affecting Solubility
Nature of the solvent and the solute:
LIKE DISSOLVES LIKE
Temperature
Pressure (for systems with gases)

10. Can you guess which of these compounds are gases?! How do you know?!
Solubility curves show the relationship between solubility and temperature.
Can you guess which of these compounds are gases?! How do you know?!