CHM 1025C Exam#4 Name: __Answers____

Module Four Part II: Chemical Bonding & Molecular Structure (Chapters 12)

L. ____ (10) Bond Angles/Bond Lengths-Section 12.8

N. ____ (10) Geometry of Molecules-Section 12.8

O. ____ (10) Polarity of Molecules-Section 12.6

M1. ____ (10) Multiple Choice-Chapters 12

______(40) Total = ______%

Module Four: Part L Bond Angles 10 points

What is the bond Angle in the following structures:

_s#4=109.5___1. _ s#4=109.5___4.

_ s#3=120 __2. _ s#3=120 ___ 5.

_ s#4=109.5__3. __s#4=109.5___6.

___ s#2=180__7. __ s#4=109.5 __ 8. __ s#4=109.5—9.

Actual 104.5 Actual 107

___10. ____11.

_____ s#3=120__10. _____ s#2=180__10.

12. _s#3=120__ 13._s#4=109.5__ 16. __s#4=109.5__

14._s#4=109.5__

15. _s#4=109.5__

17. _s#4=109.5__ 20. _s#2=180_

18. _s#3=120____

19. _s#4=109.5__

Bonus: (You figure these bonus answers)

___21. ___23.

___22. ___24.

Steric Numbers do not predict bond angles within rings of carbons, but do for attachments to the ring