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Supplemental Notes for Lecture 16: ED Geometry and Molecular Shapes, Study notes of Chemistry

These supplemental notes provide guidance on drawing out molecules to understand ed geometry and molecular shapes, emphasizing the importance of practicing these concepts for exam success. Topics covered include bond angles, lone pairs, multiple bonds, and hybridization.

Typology: Study notes

Pre 2010

Uploaded on 09/24/2009

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Supplemental notes for Lecture 16
Draw out molecules in the table to verify ED geometry and molecular shape for yourself.
Anytime you answer a HW question, ask yourself about the ED geometry, molecular
geometry, bond angles, polarity, hybridization, etc.—even if the question is NOT asking
for this. Practice is the only way to get these ideas in your gut, so you will nail it on the
exam.
C
H
H
H
HP
Cl
Cl
Cl
Cl
Cl
in plane of paper
coming toward you (wrt paper plane)
going away from you (wrt paper plane)
What effect do lone pairs or multiple bonds have on the bond angles, and why?
Donʼt forget that bent can be either ~120° or ~109°, depending on ED geometry!!!
Watch out for this, and recognize which situation applies.

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Supplemental notes for Lecture 16 Draw out molecules in the table to verify ED geometry and molecular shape for yourself. Anytime you answer a HW question, ask yourself about the ED geometry, molecular geometry, bond angles, polarity, hybridization, etc.—even if the question is NOT asking for this. Practice is the only way to get these ideas in your gut, so you will nail it on the exam. C H H H H P Cl Cl Cl Cl Cl in plane of paper coming toward you (wrt paper plane) going away from you (wrt paper plane) What effect do lone pairs or multiple bonds have on the bond angles, and why? Donʼt forget that bent can be either ~120° or ~109°, depending on ED geometry!!! Watch out for this, and recognize which situation applies.