Solutions
Objectives:
• define terms as they apply to solutions
Part 1 Basic Vocabulary

define solution
a homogeneous mixture

define solute
substance being dissolved

define solvent
substance doing the dissolving
Part 2 Solubility Curve
saturated
define-
Contains the maximum
amount of solute at a
specific temperature.
unsaturated
define-
Contains less than the
maximum amount of
solute at a specific
temperature.
supersaturated
defineContains more than the
maximum amount of solute
at a specific temperature.
This is prepared by heating
the mixture up until it does
dissolve then cooling it back
down.
Part 3 Solid Solutes
1. At 38˚C the solubility of potassium bromide is…
79g in 100g of water
2. The temperature required to dissolve completely 65.0 grams
of potassium nitrate is…
47˚C
3. The mass of ammonium chloride that can be dissolved in 250
50 g
x
grams of water at 50°C is…

100 g 250 g
x  125 g
4. If 6.75 grams of sodium nitrate would completely dissolve in
6.75
x
5.00 g of water at 70˚C, the solution would be…

5.00
supersaturated
100
x  135
T. O’Toole
Part 4 Gas Solutes
Temperature
The solubility of a gas solute
decreases when temperature
increases
Pressure (Henry’s Law)
Increasing pressure will increase the
solubility of a gas
Minute Paper
Gas Solute
The amount of dissolved oxygen in a mountain lake at
10,000 ft and 50°F is less than the amount of dissolved oxygen
in a lake near sea level at 50°F.
A Coke at room temperature will have more carbon dioxide in
the gas space above the liquid than an ice cold bottle.
Solid Solute
How do I get sugar to dissolve
faster in my iced tea?
-increase temperature
-stir
-increase surface area
How do I get from where I am to where I’m going?
10 Minute Makeover Customize your learning by choosing from the following options each
night
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

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Complete the appropriate sections on the Portfolio Page
Review the PPT file on the website
Read pages 502-508 in the book
Answer questions on page 528 # 43, 45 and 47. Answers are in Appendix C.
Check out the tutorial sources in the LiveBinder
Complete the SYS Assignment
Review the skills from today’s Train Your Brain
T. O’Toole