North Hollywood Polytechnic Community Adult School The Shape of Molecules Lab Report The instructions for this lab asks you to check out a molecular model kit from the stock room. The model kit is not required, but may be helpful in visualizing the shapes. So, if you have access to a molecular model kit, I encourage you to use it. Otherwise, you may proceed with the lab without one. Finally, in this attachment, I completed the expected answers for water as an illustrative example of how to do this exercise. Name: _________________________
The Shape of Molecules
Purpose: Determine polarity of molecules.
Check out a molecular model kit from the stock room. Check that the kit contains linear, trigonal
planar, tetrahedral, trigonal bipyramidal and octahedral electron geometries.
1. Complete the following table and build the model for each. Show the model to the instructor.
1. Write the Lewis structure for ammonium ion. Determine electron and molecular geometries
2. Write three resonance structures for the nitrate ion. Determine electron and molecular
3. What determines:
a) the electron geometry and
b) the molecular geometry of molecules or ions?
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