Chapter 5 Problem Set
CHM 161
1. Propose Lewis Structures for the following formulas. Use lines to indicate covalent bonds and
show all lone pairs of electrons.
b) HONO
c) C2Cl4
d) CH3NO
a) C2H2O2
a)
C2H2O2
O
O
C
C
Cl
b) HONO
H
H
c) C 2Cl4 Cl
O
N
O
H
H
Cl
O
d) CH3NO
C=C
H
C
N
Cl
H
2. Predict the geometry around the central element in the following:
a) CH4
b) OF2
c) NCl3
d) BH3
e) CO2
a) tetrahedral b) bent shape (tetrahedral geom.) c) pyramidal (tetrahedral geom.)
d) trigonal planar
e) linear
3. Name the following binary molecular compounds:
a) PCl5
b) BF3
c) Al2Br6
d) P3Se4
e) XeI4
a) phosphorous pentachloride b) boron trifluoride
d) triphosphorous tetraselenide
c) dialuminum hexabromide
e) xenon tetraiodide
4. Fill in the bonds and lone pair of electrons in the following molecules. In a), there are two
correct answers:
a)
C 3H6O
H
b) CHNCl2
c) C 3H6O
H
O
N
H C C
H
H
C H
H
H
C
Cl
H
C
Cl
H
H
H
C
O
C
H
5. Approximately, what is the
a) C-C-C bond angle in 4a)? 120o
b) H-N-C bond angle in 4b)? 120o
c) C-O-C bond angle in 4c)? 109o