Title | Vsepr practice problems 2 |
---|---|
Course | Preparatory Chemistry |
Institution | Texas Tech University |
Pages | 6 |
File Size | 77.3 KB |
File Type | |
Total Downloads | 14 |
Total Views | 203 |
chem practice...
VSEPR practice problems – ANSWER KEY –
1)
2)
3)
Draw the 2-D LEWIS structure below the molecular formula.
Determine both electron-domain (ED) and molecular geometry.
Determine whether bond angles are ideal (90 o, 109.5o, 120o, 180o) or distorted due to lone pair – bonding pair repulsion.
From the overall molecular geometry and the presence and arrangement of polar bonds (if any), determine if a molecule is polar. (Polarity does not apply to polyatomic ions.) PF3
PF5
SF4
ED geometry:
tetrahedral
Molecular geometry:
trigonal pyramidal
Bond angles:
< 109.5
Angles distorted?
yes
Is the molecule polar?
yes
ED geometry:
trigonal bipyramidal
Molecular geometry:
trigonal bipyramidal
Bond angles:
90, 120
Angles distorted?
no
Is the molecule polar?
no
ED geometry:
trigonal bipyramidal
Molecular geometry:
see-saw
Bond angles:
< 90, < 120
Angles distorted?
yes
Is the molecule polar?
yes
4)
5)
6)
7)
8)
SF6
CH3+
ClO-
ClO2-
ClO3-
ED geometry:
octahedral
Molecular geometry:
octahedral
Bond angles:
90
Angles distorted?
no
Is the molecule polar?
no
ED geometry:
trigonal planar
Molecular geometry:
trigonal planar
Bond angles:
120
Angles distorted?
no
Is the molecule polar?
n/a
ED geometry:
linear
Molecular geometry:
linear
Bond angles:
n/a
Angles distorted?
n/a
Is the molecule polar?
n/a
ED geometry:
tetrahedral
Molecular geometry:
bent
Bond angles:
< 109.5
Angles distorted?
yes
Is the molecule polar?
n/a
ED geometry:
tetrahedral
Molecular geometry:
trigonal pyramidal
Bond angles:
< 109.5
Angles distorted?
yes
Is the molecule polar?
n/a
9)
10)
11)
12)
ClO4-
KrF2
XeF4
XeF6
You can skip this one.
13)
XeO3
ED geometry:
tetrahedral
Molecular geometry:
tetrahedral
Bond angles:
109.5
Angles distorted?
no
Is the molecule polar?
n/a
ED geometry:
trigonal bipyramidal
Molecular geometry:
linear
Bond angles:
180
Angles distorted?
no
Is the molecule polar?
no
ED geometry:
octahedral
Molecular geometry:
square planar
Bond angles:
90
Angles distorted?
no
Is the molecule polar?
no
ED geometry:
pentagonal bipyramidal
Molecular geometry:
fluctuating, distorted octahedral
Bond angles:
90
Angles distorted?
yes
Is the molecule polar?
no
ED geometry:
tetrahedral
Molecular geometry:
trigonal pyramidal
Bond angles:
< 109.5
Angles distorted?
yes
Is the molecule polar?
yes
14)
15)
16)
17)
18)
XeO2F2
CS2
NO3-
CO32-
BH3
ED geometry:
trigonal bipyramidal
Molecular geometry:
seesaw
Bond angles:
< 90, < 120
Angles distorted?
yes
Is the molecule polar?
yes
ED geometry:
linear
Molecular geometry:
linear
Bond angles:
180
Angles distorted?
no
Is the molecule polar?
no
ED geometry:
trigonal planar
Molecular geometry:
trigonal planar
Bond angles:
120
Angles distorted?
no
Is the molecule polar?
n/a
ED geometry:
trigonal planar
Molecular geometry:
trigonal planar
Bond angles:
120
Angles distorted?
no
Is the molecule polar?
n/a
ED geometry:
trigonal planar
Molecular geometry:
trigonal planar
Bond angles:
120
Angles distorted?
no
Is the molecule polar?
no
19)
20)
21)
22)
23)
XeF3+
BrF3
IF5
HCN
NH3Cl+
ED geometry:
trigonal bipyramidal
Molecular geometry:
T-shaped
Bond angles:
< 90, < 180
Angles distorted?
yes
Is the molecule polar?
n/a
ED geometry:
trigonal bipyramidal
Molecular geometry:
T-shaped
Bond angles:
< 90, < 180
Angles distorted?
yes
Is the molecule polar?
yes
ED geometry:
octahedral
Molecular geometry:
square planar
Bond angles:
< 90
Angles distorted?
yes
Is the molecule polar?
yes
ED geometry:
linear
Molecular geometry:
linear
Bond angles:
180
Angles distorted?
no
Is the molecule polar?
yes
ED geometry:
tetrahedral
Molecular geometry:
tetrahedral
Bond angles:
109.5
Angles distorted?
yes
Is the molecule polar?
n/a
24)
25)
26)
I3-
N3-
BHCl2
ED geometry:
trigonal bipyramidal
Molecular geometry:
linear
Bond angles:
180
Angles distorted?
no
Is the molecule polar?
n/a
ED geometry:
linear
Molecular geometry:
linear
Bond angles:
180
Angles distorted?
no
Is the molecule polar?
n/a
ED geometry:
trigonal planar
Molecular geometry:
trigonal planar
Bond angles:
120
Angles distorted?
yes
Is the molecule polar?
yes...