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Bonds LewisStructures
Lab Potpourri
100 100 100 100
200 200 200 200
300 300 300 300
400 400 400 400
500 500 500 500
Final
100 BondsDefine covalent bond
Answer
Bonds 100
attraction between atoms that results
from sharing electron pairs
200 Bonds
the bonded atoms have an unequal attraction for
shared electrons Answer
Bonds 200
polar covalent bond
300 Bonds Classify each of the following as PC, NPC or I bonds. Show
numerical proof. Indicate - for PC bonds.
Sr-Cl Cl-I Si-P Al-H
AnswerAll Play!All Play!
Bonds 300
Sr-Cl EN diff = 2.0, Ionic
Cl-I EN diff = 0.5, PC
Si-P EN diff = 0.3 NPC
Al-H EN diff = 0.6 PC-
-
400 Bonds
How many bonds each do C and H have in a molecule?
Answer
Bonds 400
4 for C, 1 for H
500 Bonds
List 3 elements that can have multiple bonds (double and
triple bonds) Answer
Bonds 500
NitrogenCarbon
Oxygen
100 Lewis Structures
List the ABE formula, geometry, bond angles for
each of the following:
Answer
Lewis Structures 100
AB2E2, bent, 105o
AB5triangular bipyramidal, 90o and 120o
200 Lewis Structures
Show resonance for a molecule of O3.
Answer
Lewis Structures 200
300 Lewis Structures
Draw Lewis structures, identify ABE formula, geometry, bond
angles, polarity
NO2Cl GeH4Answer
Final Jeopardy
Draw a Lewis structure for ethyl Draw a Lewis structure for ethyl alcohol, alcohol, CC22HH55OHOH
Answer
Final Jeopardy Answer
Lewis Structures 300
AB3, triangular planar, 120o, polar
AB4, tetrahedral, 109.5o,
nonpolar
400 Lewis Structures
For the models shown, list ABE formula, geometry, bond angles, assuming bonds are polar, is molecule polar? (yes
or no)AnswerAll Play!
Lewis Structures 400
AB4, tetrahedral, 109.5o , yes polar
AB2E2 bent, 105o, yes polar
500 Lewis Structures
Make models for the following:
BeCl2 SiF4
Answer
Lewis Structures 500
BeCl2 SiF4
linear tetrahedral
100 Lab
What anion fizzes when HCl is added to it, yet it does not bleach KMnO4 soaked filter
paper?
Answer
Lab 100
The carbonate ion
CO32-
200 Lab
What lab test would you perform to determine if an
unknown substance is either MgCl2 or Ni(NO3)2. State
expected results for each identity.
Answer
200 Lab
The AgNO3 precipitate test would give a clear solution with Ni(NO3)2 and a cloudy,
white precipitate with MgCl2
300 Lab
Write the formula of the compound that has an
Orange/yellow flame and bleaches KMnO4 soaked
filter paper.
Answer
300 Lab
Na2SO3
400 Lab
Circle all of the following that are electrolytes:
H2SO4 CH4 KBr
NH4F C6H12O6
Answer
Lab 400
H2SO4 is an acid. KBr and NH4F are ionic compounds.
500 LabDescribe 3 tests you could use to differentiate between NH4NO3 and K2CO3. Describe results expected
in each test.
Answer
Lab 500
• NH4+ test – add NaOH to (aq) compound, moistened red litmus over top turns blue
• Add HCl. If CO32- present,
will fizz.
• Flame test – K burns peach
100 Potpourri
all molecules have this type of intermolecular attraction
Answer
Potpourri 100
London forces
Which of the following substances has hydrogen bonding between its molecules?
200 Potpourri
Answer
Answer for Potpourri 200
none – no bond btwn F and H
Yes – O-H bond
yes– N-H bond
300 PotpourriOf the following substances, which has the highest/lowest boiling point?C5H12 C3H8 C9H20 C4H10
Answer
Potpourri 300
• All are nonpolar hydrocarbons, so lowest molar mass (C3H8) has lowest b.p. Highest molar mass (C9H20) has highest b.p.
Which of the following substances has the highest boiling point.
Explain your reasoning.
Answer
Potpourri 400
This compound is polar with hydrogen bonding between molecules. This strong intermolecular attraction will require more energy to break and move molecules apart into gas phase.
CH4 is nonpolar.
CH3F is polar and has weak dipole-dipole attractions only.
500 Potpourri
List the three types of intermolecular forces in order of increasing strength. Answer
Potpourri 500Weakest: London forcesLondon forces (in all
molecular compounds)
Dipole-DipoleDipole-Dipole (all polar compounds)
Strongest: Hydrogen bondingHydrogen bonding (in compounds with N-H, O-H or F-H
bonding)
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