1
Carbonate CO32• What is its Lewis Structure with formal
charges)?
• What is its Electronic Geometry?
• What is its Molecular Geometry (Shape)?
• Build it (using your LA model kits!)
2
Carbonate CO32• What is its Lewis Structure with formal
charges)?
3
Carbonate CO32• What is its Lewis Structure (show formal
charges)?
• Hint 1: How many covalent bonds does C and O
like to have? Do they follow the octet rule or not?
• Hint 2: i) Count valence electrons! ii) Maximize
bonds, with minimal separation of formal
charges iii) Leftover valence e- form lone pairs
4
Carbonate CO32• What is its Lewis Structure (show formal
charges)?
•
Hint 1: How many covalent bonds does C and O like to have? Do they follow the octet rule or not?
•
Hint 2: i) Count valence electrons! ii) Maximize bonds, with minimal separation of formal charges
iii) Leftover valence e- form lone pairs
5
Carbonate CO32• What is its Lewis Structure (show formal
charges)?
•
Hint 1: How many covalent bonds does C and O like to have? Do they follow the octet rule or not?
•
Hint 2: i) Count valence electrons! ii) Maximize bonds, with minimal separation of formal charges
iii) Leftover valence e- form lone pairs
6
Carbonate CO32-
• What is its Electronic Geometry?
• What is its Molecular Geometry (Shape)?
7
Carbonate CO32-
• What is its Electronic Geometry?
(Hint: Find “magic no”: Total no of atoms and l.p.
around central atom)
• What is its Molecular Geometry (Shape)?
(Hint: Are there any lone pairs on the central
atom?…)
8
Carbonate CO32-
• Build it (using your LA model kits!)
• Does the model (and the formula above ) give
you a good representation of the molecule?
• Do you think is polar or non-polar? Discuss with
your classmates!!
9
Carbonate CO32-
10
Nitrate NO3• What is its Lewis Structure with formal
charges)?
• What is its Electronic Geometry?
• What is its Molecular Geometry (Shape)?
• Build it (using your LA model kits!)
11
Nitrate NO3-
12
Nitrite NO2• What is its Lewis Structure with formal
charges)?
• What is its Electronic Geometry?
• What is its Molecular Geometry (Shape)?
• Build it (using your LA model kits!)
13
Nitrite NO2-
Building Molecules
Relay Game!
Helpful Tips
z
z
Count valence electrons.
If you're having trouble, draw out the molecule first.
Carbon Dioxide
Carbon Dioxide
Formaldehyde
CH2O
Hint: Formaldehyde
Acetic Acid
Acetic Acid
Ammonium
Ammonium
BONUS
Starting from your AMMONIUM molecule, make
Ammonia
Ammonia
Polar Bonds vs. Polar Molecules
i) Indicate if the following molecules have
1) Ionic bonds 2) Polar covalent 3) Non-polar
covalent bonds.
a. CH2Cl2
b. CCl4
c. NaCl
d. CH3CH3 e. NH3
Are the molecules polar or non polar?
Are they soluble in water or in gasoline?
Rank the substances from the lowest to the
highest boiling point. Which ones are soluble
in water? Explain why…
• A. HF
B. NH3
c. NaCl
d. CH3CH3
Is it ionic?
yes-IONIC ; in solution? Yes (ion-dipole) ; no (ion-ion
No-COVALENT; polar? Yes (dipole-dipole);
No; London dispersion
H-bonding?
Rank the substances from the lowest to the
highest boiling point. Which ones are soluble
in water? Explain why…
A. CH3CH2CH3
• C. CH4
•
•
B. CH3CH2CH2CH3
D. CH3CH2CHCH3
|
OH
Is it ionic?
yes-IONIC ; in solution? Yes (ion-dipole) ; no (ion-ion
No-COVALENT; polar? Yes (dipole-dipole);
No; London dispersion
H-bonding?