Chemistry 312 – Chapter 9 Review Assignment
Given: A compound containing 3 chlorine atoms and a nitrogen atom
Chemical Formula _______NCl3_________
Name ________Nitrogen trichloride__________
Molecular Structure (Show all bonds and lone pairs with the approximate geometry of the molecule)
Only picture I could
find. Replace
bonding electrons
with lines.
Shape ______trigonal pyramidal____
Polarity _______Non polar__________________
How many sigma bonds? _3___ How many pi bonds? __0__
Will this compound dissolve in water? ___NO___
Given: A compound that contains 2 oxygen atoms and a sulfur atom.
Chemical Formula ____SO2____________
Name _________Sulfur dioxide__________________
Molecular Structure (Show all bonds and lone pairs with the approximate geometry of the molecule)
Shown with all of its
resonance structures
Shape ____Trigonal planar______________________
Polarity ____________nonpolar_____________
How many sigma bonds? __3___ How many pi bonds? ___1__
Will this compound dissolve in water? ___no____
Given: A polyatomic anion that contains carbon and three oxygens.
Chemical Formula ____CO32-____________
Name _______Carbonate ion____________________
Molecular Structure (Show all bonds and lone pairs with the approximate geometry of the molecule)
Shape ______trigonal planar____________________
Polarity _________nonpolar________________
How many sigma bonds? __3___ How many pi bonds? _1____
Will this compound dissolve in water? ___no____
Given: A molecule that contains 4 iodine atoms and one silicon atom.
Chemical Formula _____SiI4___________
Name __________Silicon tetraiodide_________________
Molecular Structure (Show all bonds and lone pairs with the approximate geometry of the molecule)
Best I could do
Shape _______tetrahedral___________________
Polarity _______non polar__________________
How many sigma bonds? ___4__ How many pi bonds? _0____
Will this compound dissolve in water? ____no___
Name the following compounds/acid
Write the formulas for the following compounds/acids
H2PO3 _______Phosphorus Acid
Pentanitrogen dichloride
___N5Cl2____
HBr _________Hydrobromic Acid
Chloric acid
__HClO3________
Si4O7 ______Tetrasilicon heptoxide
Octaselenium hexafluoride _____Se8F7____
Chemistry 312 – Chapter 9 Review Assignment
Name ___________________________
Given: A polyatomic cation that contains four hydrogen atoms and one nitrogen atom
Chemical Formula _____NH4+_______
Name _____ammonium ion______
Molecular Structure (Show all bonds and lone pairs with the approximate geometry of the molecule)
Shape ______Tetrahedral____________________
Polarity ________nonpolar_________
How many sigma bonds? __4___ How many pi bonds? __0___
Will this compound dissolve in water? ____no___
Given: A compound that contains two chlorine atoms and an oxygen atom.
Chemical Formula ___Cl2O_____________
Name _______Dichlorine monoxide____________________
Molecular Structure (Show all bonds and lone pairs with the approximate geometry of the molecule)
Shape ______Bent
____________________
Polarity ________Polar_________________
How many sigma bonds? ___2__ How many pi bonds? ___0__
Will this compound dissolve in water? ____yes___
Additional Questions:
1.
Which of the following compounds are covalently bonded? (circle all that apply)
a. NO2
2.
b. CCl4
d. NH4Cl
e. BH3
f. BaCO3
How many sigma and pi bonds are there in the following molecule?
Sigma __3__
3.
c. CuS
Pi __2__
In the diagram above, which has the shorter bond length, the carbon to carbon bond, or the carbon to hydrogen
bond? Which bond would require more energy to break? Explain.
Carbon to Carbon. As the bond number increases the bond length decreases. The carbon to carbon bond
would be harder to break because you would essentially need an amount of energy equal to the that amount
that is given off as the bond forms.
4.
Draw two resonance structures for the polyatomic anion CO 32-
Pi bond
5.
Which of the following compounds contains at least one pi bond?
a.
6.
CO2
b. CHCl3
c. AsI3
d. BeF2
Draw the structure of your answer to #4 and indicate where the pi bond(s) are in the structure.
See above
7.
Chloroform (CHCl3) was one of the first anesthetics used in medicine. The chloroform molecule contains 26
valence electrons in total. How many of these valence electrons take part in covalent bonds? 8
8.
All of the following compounds have bent molecular shapes except____________.
a.
9.
BeH2
b. H2S
c. H20
d. SeH2
What shape does your answer to #6 have? _____Linear______
10. Which of the following compounds is not polar?
a. H2S
b. CCl4
c. AsH3
d. CH2Cl2
11. Draw the structural formula for your answer to #9 and explain why this molecule is non-polar.
The individual bond polarities cancel eachother out.
12. Name the following acids or write their formulas
H3PO3 ___Phosphorus acid
HCl ____hydrochloric acid
HClO3 _____Chloric Acid_ ____________________