1. Launch: 1/6
 Grab your binder and immediately take a seat!
 Place launch paper and HW (practice questions) on your
desk.
 Yesterday’s Exit Slip Data:
92%
 Today’s Objective: I can describe the dissolving process at
the molecular level.

2. Launch: 1/6
 Grab your binder and immediately take a seat!
 Place launch paper and HW (practice questions) on your
desk.
 Yesterday’s Exit Slip Data:
84%
 Today’s Objective: I can describe the dissolving process at
the molecular level.

3. Launch: 1/6
 Grab your binder and immediately take a seat!
 Place launch paper and HW (practice questions) on your
desk.
 Yesterday’s Exit Slip Data:
88%
 Today’s Objective: I can describe the dissolving process at
the molecular level.

4. Launch: 1/6
 Grab your binder and immediately take a seat!
 Place launch paper and HW (practice questions) on your
desk.
 Yesterday’s Exit Slip Data:
-
 Today’s Objective: I can describe the dissolving process at
the molecular level.

5. Launch 1/6
1. In 1-2 sentences, define a solute and a solvent.

6. Launch 1/6
2. Which of the following statements about solutions
is correct?
a. In a solution, the solute is dissolved into the solvent.
b. In a solution, the solvent is dissolved into the solute.
c. In a solution, the solvents are usually a solid.
d. In a solution, the solutes and solvents are unequally
mixed.

7. Launch 1/6
3. A teaspoon of dry coffee crystals dissolves when
mixed in a cup of hot water. This process
produces a coffee solution. The original crystals
are classified as a
a. solute.
b. solvent.
c. reactant.
d. product.

8. New Changes for the New Year!
 Late homework policy
 Late homework in now due the day after you return
 Notes packets, handouts, and practice questions will
can be found:
 at the back of the classroom

9. New Changes for the New Year!
 Class consequences
1. Name on board
2. Take a break
3. Call home
4. Sent to Mr. Wandera
 Rules: still the same 7

10. Monday
January Calendar
LPS Chem, Assessments, Unit Plan
Tuesday Wednesday Thursday
Jan 2010 (Pacific Time)
Friday
28 29 30 31 1
4 5 6 7 8
Solutions
11 12 13 14 15
Solutions Acids and Bases
Quiz
18 19 20 21 22
MLK No School Acids and Bases
End of Semester
Quiz
25 26 27 28 29
Acids and Bases
Unit #6 Exam

11. How are solutes dissolved?
Mr. Heffner
1/6/10

12. Review: What is a solution?
 A solution is…
 a homogeneous mixture made up of a solute and a
solvent
solution = solute + solvent
• a solid • a liquid
• is dissolved • does the dissolving
• molecules don’t move • random movement

13. How are solutes dissolved?
 Solvent molecules randomly hit the solute and attack!
 Example:
 Solute = table salt (NaCl)
 Held together by ionic bonds
 Solvent = water
 Polar solvent: unequal sharing
–
+

14. How are solutes dissolved?
 Attack!
 http://www.mhhe.com/physsci/chemistry/
essentialchemistry/flash/molvie1.swf
 Movie questions:
1. What is the solute?
2. What is the solvent?
3. In your own words, describe how the salt was dissolved?

15. How are solutes dissolved?
water molecules
attack solute
overcome the
attractive forces
of the solid
dissolve the ion

16. Activity
 In 3-4 sentences, describe what we just acted out.
 Who were the solutes and what were the doing?
 Who were the solvents and what did they do?

17. Practice Questions
 Practice question worksheet

18. Exit Slip
1. In a solution,
a. the solvent particles are attacked by the solute.
b. the solvents are dissolved by the solutes.
c. the two substances are not evenly mixed throughout.
d. the solutes are dissolved by the solvents.

19. Exit Slip
2. Which of the following is correct statement.
a. In a solution, the solute molecules randomly move
around while the solvent molecules don’t move.
b. In a solution, the solvent molecules randomly move
around while the solute molecules don’t move.
c. A solution is an example of a heterogeneous mixture.
d. Solvents are usually solids

20. Exit Slip
3. Which of the following is a correct statement about
the dissolving process?
a. The solvent molecules randomly bump into the
solutes and attack.
b. In a solution, the solvent is dissolved into the solute.
c. In a solution, the solvents are usually a solid.
d. In a solution, the solutes and solvents are unequally
mixed.

21. Exit Slip
4. An ionic salt (KBr) is dissolved into water. In this
example,
a. both KBr and water are solvents.
b. KBr (the solvent) is attacked by water (the solute),
splitting it into K+ and Br– ions.
c. KBr (the solute) is attacked by water (the solvent),
splitting it into K+ and Br– ions.
d. the KBr attacks the water and dissolves it into
solution.

22. Exit Slip
5. If the attractive forces among solid particles are
less than the attractive forces between the solid
and the liquid, the solid will
a. probably form a new precipitate as its crystal lattice
is broken and reformed.
b. be unaffected because the attractive forces within
the crystal lattice are too strong for dissolution to
occur.
c. begin the process of melting to form a liquid.
d. dissolve as particles are pulled away from the crystal
lattice by the water molecules

23. Homework
 Finish practice questions