Chem lab 6 and 7

CHEM101LLab61.docx

Lab 6 Molecular Geometry CHEM101L

Student Name: Click here to enter text. Access Code (located on the lid of your lab kit):

Pre-Lab Questions:

1. Describe the difference between valence and core electrons.

2. What is the octet rule and which elements obey the octet rule?

3. How does VSEPR affect the shape of molecules?

4. What effect does the presence of lone-pair electrons have on the bond angles in a molecule?

Experiment 1: Molecular Models of Neutral Molecules

Part 1: Periodic Table

Table 1: Lewis Dot Structures

Table 1 Upload of Lewis Dot Structure Sketches with your name and access code handwritten in the background:

Part 2: Construction of Molecules

Table 2

Molecule (central atom is underlined)	Sketch of Lewis Dot Structure	Shape Name Bond Angle	Structure	Bond Angle
CO2	(Upload photo below)	Linear
AlCl3	(Upload photo below)	Trigonal Planar
H2O	(Upload photo below)	Bent
NH3	(Upload photo below)	Trigonal pyramidal
CCl4	(Upload photo below)	Tetrahedral
PCl5	(Upload photo below)	Trigonal bipyramidal
SF6	(Upload photo below)	Octahedral

Table 2 Upload of Lewis Dot Structure Sketches and Molecular Models (Table 2a) with your name and access code handwritten in the background:

Table 2 Upload of Lewis Dot Structure Sketches and Molecular Models (Table 2b) with your name and access code handwritten in the background:

Post-Lab Questions:

1. Should all of the angles in methane (CH4) be equal? Why or why not?

2. What additional information does the VSEPR theory give you beyond electron dot structures, in terms of molecular structure?

3. Sketch the molecular shape of the following compounds. Be sure to label the bond angles. Upload the photo below.

Table 3

Compound

Cl2

SO2

NH3

MoF6

Table 3 Upload of molecular shape sketches with your name and access code handwritten in the background: