Chemistry 12: Structure and Bonding Unit - Sept 26 - Oct 30

Wed Oct 30:

Structure and Bonding Test
homework:
No homework

Mon Oct 28:

Aggregates lab quiz was written and questions were answered about the test next class.  Some review time was given.
homework:
Review for test.  Practice written part is on this site.  (complete in 40 min.;  there will also be around 30 multiple choice.

Thurs Oct 24:

Quizzes were passed back and we talked briefly about how to apply VSEPR and polarity to larger more complex biochemistry molecules.  Then we determined melting time for 4 solids as a class before groups made observations on appearance, hardness and conductivity for the 4 samples. Observations charts were handed in.
homework:
Study Aggregates and their properties and bonding in preparation for the lab quiz next class.Those students that missed the lab will receive data and write the lab quiz next class with the other students.

Tues Oct 22:

We took up the polarity questions,  went over the format of the Aggregates lab, then had the quiz.
Students worked on practice questions on bonding in aggregates, and properties of solids from the textbook (p. 273 #2,4,5,7;  p.  276  # 1,3,4,7,8,9  and p. 12 in notes supplementary questions A,B and C)
homework:
Review Aggregates and do practice questions stated above.

Fri Oct 18:

We covered VSEPR worksheet p. 9-10 (answers are  on website), reviewed polarity of bonds and molecules (see self study on p. 11 if you need it),  reviewed intermolecular bonding (p.  12) and discussed bonding and properties in solids of various types (p. 13)
homework: 

• prepare for quiz next class that has:  VSEPR (like p. 9-10),  predict polarity of molecules,  assess what kinds of intermolecular bonds are present in various molecular compounds.
• finish predicting polarity (p. 9-10)
• Do p. 14 reviewing the 4 types of Aggregate solids/crystals

Wed Oct 16:

We covered VSEPR ( p.  7-8;  examples on p.3)
homework: 

Do VSEPR worksheet p. 9-10.

Thurs Oct 10:

We expanded our Lewis diagrams (beyond octet rule) to include polyatomic ions also.  After the quiz, students were given time to work on drawing the Lewis structures (only) on p. 9 and 10 of the notes.
homework: 

Thanksgiving - no homework.  If you want to get ahead, you should learn the names of the 5 basic shapes (linear, trigonal planar,  .... octahedral) from p. 4 chart and finish the Lewis structures on p. 9-10.
I have put some extra hybridization practice questions with full solutions on the class resources.  It is posted after the notes for this unit.
Tues Oct 8:

We took up  Hybridization homework, finished the example SF6 on p. 6.  We spent some time working on the last 2 practice molecules:  BrF5 and AsCl5.  Then we covered Lewis diagrams beyond the octet rule (bottom of p. 3).  We took up the multiple choice of the atomic structure test.  We discussed the format of the quiz next class.
homework: 

Prepare for quiz on simple VB theory and Hybridization (p.  2-6 roughly) which is next class (Thurs Oct 10.  Also try the new method of drawing Lewis diagrams on the first 6 molecules on p. 9 of your notes.

Fri Oct 4:

We took up simple VB theory practice  H2O,  HNO,  NH3,  took up one of the Hybridization homework molecules,  then we did 2 more  Hybridization examples HNO and C2Br2 p. 5-6  (CH4 example)

homework:
Use Hybridization to work out bonding in the rest of the molecules (except BrF5 and AsCl5)
Follow the format in the notes.  Memorize shapes of the hybrid orbitals for the 5 different hybridization states.

Wed Oct 2:

We finished simple VB theory (p. 2 of new notes),  started Hybridization p. 3-5  (CH4 example)

homework:  Use simple VB to work out bonding in: H2O,  HNO,  NH3 (partly done in class)
Use Hybridization to work out bonding in :BI3,  H20,  NH3
Follow the format in the notes.

Thurs Sept 26:

We got a new notes package on the bonding unit and covered the first page and a half (up to and including Br2.  Textbooks were distributed.

homework:  Review for the Atomic Structure test.  

Please note: completed notes,  power point and atomic structure Questions can be found on this site under "class resources" 

TENTATIVE BONDING AND STRUCTURE EVALUATION DATES:

Oct 10-VB and Hybridization Quiz
Oct 22- VSEPR Quiz
Oct 24-Aggregates lab 
Oct 28- Aggregates lab quiz
Oct 30 - Structure and Bonding test