lab this week exam #4 this friday! today’s topics molecular shape (8.6) molecular polarity (8.7)...

•LAB THIS WEEK•EXAM #4 THIS FRIDAY!•TODAY’S TOPICS

Molecular Shape (8.6)

Molecular Polarity (8.7)

November 30, 2009

Molecular Geometry = Electron Pair Geometry, ignoring lone pairs

BF3 and O3

Molecular Geometry = Electron Pair Geometry, ignoring lone pairs

Lone pairs alwaysgo in equatorial sites

Molecular Geometry = Electron Pair Geometry, ignoring lone pairs

Molecular Geometry = Electron Pair Geometry, ignoring lone pairs

What is the molecular geometry of NO2

-?

1. Linear2. Bent3. Trigonal planar4. Tetrahedral5. Trigonal pyramid6. T-shaped7. Square pyramid8. Square planar9. octahedral

What is the molecular geometry of …

1. Linear2. Bent3. Trigonal planar4. Tetrahedral5. Trigonal pyramid6. T-shaped7. Square pyramid8. Square planar9. octahedral

What is the molecular geometry of …

1. Linear2. Bent3. Trigonal planar4. Tetrahedral5. Trigonal pyramid6. T-shaped7. Square pyramid8. Square planar9. octahedral

What is the molecular geometry of …

1. Linear2. Bent3. Trigonal planar4. Tetrahedral5. Trigonal pyramid6. T-shaped7. Square pyramid8. Square planar9. octahedral

Molecular Polarity

Polarity = uneven distribution of charge Bond polarity = Electrons drawn closer to the more

electronegative atom Molecular polarity = Molecule as a whole has a net

separation of charge A polar molecule must have polar bonds A molecule is polar if the directions of the polar bonds

don’t cancel/offset eachother

Nonpolar Examples: CH4, CO2

Polar Examples: H2O, NH3