1. Friday, February 6th, 2015
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
HW: #12 G, H, and J only; finish classwork activity Objective: We will apply the octet rule to determine the Lewis dot diagrams for covalent compounds Catalyst: F. more acidic. G. less acidic. H. equally acidic. J. less acidic for pepsin, but more acidic for trypsin.
***Table of Contents
2/ POGIL and Notes: Naming Molecular Compounds
2/ Table: Molecular Geometry VESPER
2/ Classwork: Drawing Covalent Compounds

2. Friday, February 6th, 2015 ***Table of Contents
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
HW: #12 G, H and J only; finish classwork packet Objective: We will apply the octet rule to determine the Lewis dot diagrams for covalent compounds Catalyst: A. A technique of adding titrant to a sample solution. B. A substance showing the conductivity of a solution. C. A substance changing color to indicate a solution being neutral. D. There is not enough information to determine.
***Table of Contents
2/ POGIL and Notes: Naming Molecular Compounds
2/ Table: Molecular Geometry (VESPER)
2/ Classwork: Drawing Covalent Compounds

3. Announcements No tutoring today.
Tutoring Next Week: Monday and Thursday
Quiz Tuesday

4. Agenda Catalyst/Announcements Notes on how to draw covalent compounds.
Practice drawing covalent compounds.

5. Review.
How would you draw a Lewis dot structure for NaCl?

6. Review.
Why do we put brackets around the chlorine atom in NaCl?

7. Review.
How are covalent bonds different from ionic bonds?

8. CO2
Carbon dioxide is the gas that we exhale out of our bodies each and everyday. Although it is invisible to our eyes, it does have a distinct structure. So what does CO2 look like anyway???

9. Steps for Drawing Covalent Compounds
Example
1.) Determine the total number of valence electrons ALL of the atoms have.
CO2 = C + O + O
CO2 has 16 e-

10. Steps for Drawing Covalent Compounds
Example
2.) Determine the total number of valence electrons ALL of the atoms want.
CO2 = C + O + O
CO2 wants 24 e-

11. Steps for Drawing Covalent Compounds
Example
3.) Calculate the number of electrons the compound will share.
Equation:
wants – has = shared
24 – 16 = 8
8 e- will be shared in CO2

12. Steps for Drawing Covalent Compounds
Example
4.) Determine the central atom.
Single atom
Carbon
Least Electronegative atom C

13. Steps for Drawing Covalent Compounds
Example
5.) Put the central atom in the middle and write the other atoms around.
O C O

14. Steps for Drawing Covalent Compounds
Example
6.) Draw a single bond between the central atom and the outer atoms.
O C O

15. Steps for Drawing Covalent Compounds
Example
7.) Check your equation to make sure enough electrons are being shared. If not, draw in more bonds.
CO2 shares 8 e-
O C O

16. Steps for Drawing Covalent Compounds
Example
8.) Fill in the non-bonding electrons on the outside atoms to fulfill the octet rule. (Remember: Hydrogen only needs 2 electrons!)
CO2 has 16 e-
O C O

17. Steps for Drawing Covalent Compounds
Example
DISCUSS: Do all of the atoms have the number of electrons that they want???
CO2 has 16 e-
O C O

18. Additional Examples
Trioxide – AKA Ozone (O3)
Cyanide (CN-)

19. Practice
Work with your elbow partner to answer practice problems 1-12.