Shapes of Molecules and Polyatomic Ions
Name
AP Lab #6
Date
Purpose: (brief statement of what you are attempting to do. These are similar to the objectives. )
Procedure: (A brief description of the method you are using. You may refer to the lab document
for specific instructions, but you should include a brief statement of the method. DO not include
lengthy, detailed directions. A person who understands chemistry should be able to read this section
and know what you are doing. Include all chemicals used and the major equipment. )
Results:
Observations: (General descriptions of visible appearances or changes that occur during the
experiment, such as “table salt is a white, cube-shaped crystal which dissolves in water.
(Qualitative))
Data: (Neatly arranged measured values listed in tabular form. The units of measurement
MUST be included with the numerical values. The accuracy of the measurement can also be
included as a range (+/-). Calculated answers that are derived by performing a simple mathematical
operation can also be included in the data table. If the graphs are included, make the graphs an
appropriate size. Label all axes and give each graph a title.)
Model
# of epairs
on
central
# of
term.
atoms
# lone
Central
pairs hybridization
on
central
egeometry
Molecular Bond
geometry angle(s)
Polar /
nonpolar
A
B
C
D
E
F
G
H
I
J
K
1
L
M
N
Conclusion: (Make a simple statement concerning what you can conclude form the experiment.
Refer back to the purpose of the lab to write this section. (i.e. How was the purpose of the
experiment fulfilled?))
Discussion of Theory: (In this section you should include such information as: What theory was
demonstrated in this experiment (Include concepts used in the experiment)? What do the
calculations show? Why does (or doesn’t) the experiment work? This section shows me that you
understand the concepts used in the lab. Be detailed and ask if you need help! )
Post Lab Questions: (Answer any questions included in the lab. Answer in such a way that the
meaning of the question is obvious in your answer. )
Divide your lab book page into 12 quadrants. In each square write the question number and
letter, the formula of each molecule given below, the Lewis structure, the shape, the electron
geometry, the hybridization and draw the arrow indicating the dipole moment if one is
present. BE NEAT.
1. a) CH4
g) PH3
b)CH3Cl
h) BCl3
c) CCl4
i) SO2
d)C2H4
j) TeCl4
e) SO3
f)SCl2
2. Which of these involve double bonds in their Lewis structures? Assume that all atoms
follow the octet rule.
a) CO32b) SO42c) SO3
d) CO2
e) SiO32f)SO323. What is the shape of the following species?
a) CS2
b) BO33c) TiCl4
d) TeO2
2g) SiO3
h) SF4
i) AsF5
k) XeF2
n) IF5
e) IOl) MoF6
f)SCl2
m) ICl4-
4. Hydrogen peroxide (H2O2) and ozone (O3) have a dipole moment. Are these
symmetrical molecules? Explain. Is it a polar or nonpolar molecule?
1a)
1b)
1c)
2
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
1d)
1e)
1f)
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
1g)
1h)
1i)
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
1j)
2a)
2b)
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
2c)
dipole Y/N
Hybrid:
2d)
dipole Y/N
Hybrid:
dipole Y/N
dipole Y/N
dipole Y/N
dipole Y/N
2e)
3
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
2f)
3a)
3b)
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
3c)
3d)
3e)
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
3f)
3g)
3h)
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
3i)
dipole Y/N
Hybrid:
3k)
dipole Y/N
Hybrid:
dipole Y/N
dipole Y/N
dipole Y/N
dipole Y/N
3l)
4
mg:
mg:
mg:
eg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
3m)
3n)
mg:
mg:
eg:
eg:
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
Hybrid:
dipole Y/N
dipole Y/N
5