CHEM 106 Lab Report 5 and 6

Name: Nguyen Nguyen


Date: 03-07-2021

TA/Professor Name: Qize Zhang

Experiment 5 and 6: How can we build molecules? “Models to the rescue” and VSEPR and

molecular shape “How does it look?”




Introduction:

To observe molecules, it is a must to notice their molecular structures, bond lengths, bond angles,

and crystal structures. In these two labs, we learn to build molecular models of various

compounds. Not only that, but we are also able to investigate shapes of molecules, understand the

factors that determines the preferred shape, and to use the valence-shell electron pair repulsion

model to predict the shapes of the molecules. For lab 5, we will be using the Avogadro program

to build our models and record our data. Meanwhile, in lab 6, we use the WebCSD to build our

models and record required data.

Materials:

Lab 5


1. Lab manual

2. Avogadro App

3. Laptop/Computer

Lab 6

, 1. WebCSD

2. Lab manual

3. Laptop/Computer


Observations and Experimental Data:

Lab 5


Model of NH3




This is a screenshot of the molecular model of NH3 and with the angle measurement and the bond
length after optimization.
Model of H2O




This is a screenshot of the molecular model of H2O and with the angle measurement and the bond
length after optimization.

, Model of CH4




This is a screenshot of the molecular model of CH4 and with the angle measurement and the bond
length after optimization.
Model of OCl2




This is a screenshot of the molecular model of OCl2 and with the angle measurement and the bond
length after optimization.
Model of CS2