Warm up. Define the terms heterogeneous and homogeneous . What do you think is the difference between dissolving and melting?. Warm up. Heterogeneous: not uniform in composition Parts are usually visually distinct Homogeneous: uniform in composition
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Chapter 15 (write the red!)
**Do not confuse dissociation with ionization!
Alloys (steel, brass, etc.)
Kool Aid, salt water
Antifreeze, rubbing alcohol
Coke, 7 Up, Pepsi
Solutions should not be confused with suspensions, colloids, or emulsions
Atoms, ions, small molecules
Stable, no separation
Particles not retained on filters
Yes! Both are polar.
No! Salt is polar, CBr4 is not.
16 M HCl = x moles HCl x = 0.050 L x 16 M
0.050 L = 0.80 moles HCl
1.0 M = 0.80 moles HCl
x L solution
x = 0.80 L = 800 mL (Sig figs: 8.0 x 102mL)
How do we describe the amount dissolved compared to the amount you CAN dissolve?
Reading and Interpreting
39 g KCl
~441 g NaNO3
4 g SO2
Most = KI; Least = KClO3
Kf = -1.86 K·kg/mol
Kb = 0.512 K·kg/mol