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)
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)
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)
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 b. CCl4 c. CuS d. NH4Cl e. BH3 f. BaCO3
2. How many sigma and pi bonds are there in the following molecule?
Sigma __3__ Pi __2__
3. 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 CO32-
5. Which of the following compounds contains at least one pi bond?
a. CO2 b. CHCl3 c. AsI3 d. BeF2
6. 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. BeH2 b. H2S c. H20 d. SeH2
9. 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______