Wolfe/Lentz
Name:______________________________________
Unit 12 Study Guide
Vocabulary
Dilute
Concentrated
Solution
Concentrated Solution
Dilute Solution
Saturated solution
Unsaturated Solution
Supersaturated Solution
Solute
Solvent
Molarity
Mass Percent
Formula for mass percent:
Application problems:
What relationship exists between solubility and temperature for most of the substances
shown?
What is the exception?
What general principle accounts for this exception?
A 135 g sample of seawater is evaporated to dryness, leaving 4.73 g of solid residue (the
salts formerly dissolved in the seawater). Calculate the mass percent of solute present in
the original seawater.
What is the concentration of 81.0 mL of a 7.0 M HCL stock solution is diluted to a new
volume of 2.00L. The concentration of this new solution is?
A 1.2 M HNO3 solution contains 3.3 moles of KNO3. How much solution is needed?
Understand how to interpret information from the
following chart
Example: A saturated solution of KNO3 in 200 g of H2O at 50oC is cooled to 20oC. How much
KNO3 will precipitate out of solution?