Chem Exam 4 Flashcards
2 Electron Domains
Linear, 180, sp
3 Electron Domains
Trigonal Planar, 120, sp2
4 Electron Domains
Tetrahedral, 109.5, sp3
5 Electron Domains
Trigonal Bipyramidal, 120 & 90, sp3d
6 Electron Domains
Octahedral, 90, sp3d2
As the number of nonbonding pairs increases, the bond angle
decreases
Linear Molecular Geo
Linear
Trigonal Planar Molecular Geo
Trigonal Planar
Bent
Tetrahedral Molecular Geo
Tetrahedral
Trigonal pyramidal
Bent
Trigonal Bipyramidal
Trigonal Bipyramidal
Seesaw
T-Shaped
Linear
Octahedral
Ocathedral
Square Pyramidal
Square Planar
Electronegativity
Increases up and right
Dipole moment
Polar
How to find dipole moments
The moment moves towards more electronegative element, make sure they don’t cancel out
Polarity Rules
Any molecule with 1 or 2 lone pairs on central atom is polar (EXCEPT OCTAHEDRAL) & any molecule with different bonds on the outside is polar
The basis of the VSEPR model of molecular bonding is ________
Electron domains in the valance shell will arrange themselves to minimize repulsion
Polar
Molecule will be polar even if all atoms are same IF LONE PAIRS PRESENT
A typical double bond ________.
Is stronger and shorter than a single bond
Consists of one σ bond and one π bond
Imparts rigidity to a molecule
Consists of two shared electron pairs
In a polyatomic molecule, “localized” bonding electrons are associated with ______
Two particular atoms
A typical triple bond ________.
Consists of one o bond and 2 pi bonds
The kinetic-molecular theory predicts that pressure rises as the temperature of a
gas increases because ________.
both the gas molecules collide more frequently with the wall and the gas molecules collide more energetically with the wall
The vapor pressure of any substance at its normal boiling point is ____
1 atm
760 mmh
1 atm
On a phase diagram, the critical pressure is ________.
the pressure required to liquefy a gas at its critical temperature
Ideal Gas Law
PV=nRT
Name Equations
P1V1/n1T1 = P2V2/n2T2
Gas Density
D=P*MM/RT
What intermolecular forces has highest boiling point
Ionic Bonding > Ion-Dipole > Hydrogen Bonding > Dipol-Dipole > London Diperson
