CHM 1025
“Molecular Models”
Name:
KEY
Directions: For each of the following compounds name the compound, draw the Lewis Dot Structure, determine the molecular shape,
state the molecular polarity.
Molecule or Ion
CBrH3
Lewis Dot Structure
Molecular Shape
Polar or Nonpolar
Tetrahedral
Polar
Trigonal Planar
Non-polar
Trigonal pyramidal
Polar
Bent
Polar
Tetrahedral
Non-polar
BF3
NH3
H2O
CH4
XeCl4
Square planar
Non-polar
Trigonal bipyramidal
Non-polar
Bent
Polar
Trigonal planar
Non-polar
Linear
Non-polar
Octahedral
Non-polar
Linear
Non-polar
Linear
Non-polar
PCl5
SO2
-
CO32-
-
-
N2
SF6
CO2
C
O2
XeF5+
Square pyramidal
Non-polar
Post-lab Questions:
1. a) Draw four resonance structures for PO433-
3-
-
-
-
-
3-
-
-
-
3-
-
-
-
b) Give the formal charge of each atom
P=
0
3 single bonded oxygens =
-1
double bonded oxygen = 0
c) Does having this resonance make phosphate more stable or less stable than an ion with no resonance structures?
More stable, increase charge distribution.