NVCC AL Campus CHM 111 Worksheet
Chapters 9 and 10: Chemical Bonding: Lewis Theory and Molecular shapes
Q1.
Q2.
Name: ______________________________________
Write the Lewis symbols of the following
a) P3–
b) Cl
c) Si
d) He
e) Ba2+
f) O2–
What will be the geometry about each central atom in the following molecules? Draw a sketch of the molecule.
The skeletal structure for each molecule is listed in parentheses.
a) C2H2 (HCCH)
b) N2H4 (H2NNH2)
c) CH3NH2 (H3CNH2)
d) CF3COOH
(both O atoms are attached to the second C, H atom is attached to O)
NVCC AL Campus CHM 111 Worksheet
Q3.
Molecule
COCl2
NH3
CH2F2
HCN
BrF4–
OF2
Lewis
Structure
# of Electron
groups on
central atom
Electron
geometry
Molecular
geometry
Expected
Bond
angle (s)
Hybridization
Polar? Yes or
No
NVCC AL Campus CHM 111 Worksheet
Molecular
Formula
SiBr4
BCl3
XeF4
N3–
PCl5
Lewis
Structure
# of Electron
groups on
central atom
Electron
geometry
Molecular
geometry
Expected
Bond
angle (s)
Hybridization
Polar? Yes or
No
NVCC AL Campus CHM 111 Worksheet
Q4.
Draw all possible resonance Lewis structures for NO2+. Use Formal Charges to identify the best Lewis structure amongst them.
Q5.
What is the formal charge on all atoms in the following Lewis structure?
Q6.
Using bond energies given in the text, calculate the ΔHrxn for the following
a. 2 HCl (g) + F2 → Cl2 (g) + 2 HF (g)
b. CO(g) + 2H2(g) → CH3OH(g)
NVCC AL Campus CHM 111 Worksheet
Q7.
Fill in the chart for the 5 indicated carbons in the molecule below.
H
H
H
C
C
C
H3C
O
C
CH3
C
C
O
H
A
Carbon
Hybridization
B
π bonds? Yes or no
A
B
C
D
E
What is the total number of π and σ bonds present in the molecule shown above?
C
D E
How many π bonds?
Bond Angle
Geometry about each C
NVCC AL Campus CHM 111 Worksheet
Q8.
Draw Resonance Lewis structures for the following compounds.
a) HCO2–
b) SO3
c) Cl2CO
d) OCN–
H O
I II
e) H2N – C – C – OH
I
CH2
I
SH