7. Valence Shell Electron Pair Repulsion (VSEPR) Flashcards
Name 5 types of shapes/geometries of molecules.
2 - Linear 1 + 3 - trigonal planar 1 + 4 - tetrahedral 1 + 5 - trigonal bypyramidal 1 + 6 - octahedral
What is the bond angle of linear molecule?
180 degrees
What is the bond angle of trigonal planar molecule?
120 degrees
What is the bond angle of tetrahedral molecule?
109.5 degrees
What is the bond angle of trigonal bipyramidal molecule between equatorial atoms?
120 degrees
What is the bond angle of octahedral molecule?
90 degrees
What is the bond angle of trigonal bipyramidal molecule between axial to equatorial atoms?
90 degrees
Arrange the Strength of Repulsive Forces in decreasing order: LP-BP LP-BP BP-BP (LP: Lone pair, BP: Bond pair)
LP-LP > LP-BP > BP-BP
What 2 factors affect bond angles?
- ____ (2 words)
- ____ (2 words)
Lone pairs, Bond order
To determine overall dipole of a molecule,
- For dipoles opposite one another, ____.
- For dipoles at different orientation, take ____ (2 words).
Cancel, Vector sum
Molecule is polar when bond dipoles do not ____ and it contains ____ bonds.
Cancel, Polar
Molecular polarity is affected by ____ and ____ (2 words).
Shape, Bond polarity
____ are sets of molecules with same chemical formula but different structures.
Isomers
____ (2 words) occurs when pairs of molecules exists as ____ (2 words) mirror images.
Optical isomerism, Non-superimposable
Paired optical isomers have same ____ properties but different ____ properties.
Physical, Chemical
____ center has ____ carbon atom.
Chiral, Asymmetric
____ carbon has ____ different atoms/groups arranged tetrahedrally around it.
Asymmetric, Four
