Chemistry I Semester 1 Review: Day 3 Student name______

Unit 4 – Intramolecular Bonding

  1. Construct Lewis diagrams for the following molecules.

AsH3 / H2O / CCl4 / CO2 / N2
  1. For each molecule above, how many lone/nonbonding/unshared pairs of electrons are around the central atom?

AsH3 _____H2O_____CCl4 _____CO2 _____N2 _____

  1. What does VSEPR stand for? How is it used to explain the shape of molecules?
  1. How many electron domains (bonds and unshared pairs) on the central atom do each of these structures contain?

a. linear ______b. tetrahedral ______c. trigonal planar ______d. trigonal pyramidal _____

  1. Complete the following chart.

Shape name / Linear / Bent / Trigonal planar / Trigonal pyramidal / Tetrahedral
Example drawing
(ball and stick)
Molecule / Lewis Structure / Molecule shape / Polar/nonpolar
GeF4
HCN
PF3
H2Se
  1. Identify if a Lewis Structure, the molecular shape, or both would show the following:
  2. 3-D structure ______d. arrangement of electron pairs ______
  3. numberof valence electrons ______e. ratio of atoms in a molecule ______
  4. accurate bond angles ______f. unshared electron pairs ______
  1. Complete the following chart.

Unit 5 – Intermolecular forces

1. What are intermolecular forces? (how are they different from intramolecular forces?)

2. What kinds of substances have intermolecular forces? Ionic, molecular, or metallic?

3. a. List the types of intermolecular forces. b. Compare their strengths. c. Identify if they exist between polar or nonpolar molecules.

4. Which of the following molecules would form London Dispersion forces with other particles of the same molecule? Nitrogen (N2) Water (H2O) Methane (CH4) NH3

5. Which of the following molecules would form Dipole-Dipole forces? HBr Water NH3 PCl3

6. Which of the following molecules would form hydrogen bonds? Water NH3 C2H6 H2

7. Draw a picture showing how London dispersion forces can occur in the following:

Neon atomArgon atom

Which atom will have the highest boiling point? ____ Why?

8. What type of intermolecular force would exist between the following molecules?

Which molecule will have the strongest intermolecular force? Why?

9. Which of the following molecules of C5H12 would have the lowest boiling point?

a.
CH3-CH2-CH2-CH2-CH3 / b.
CH3-CH2-CH-CH3
l
CH3 / c.
CH3
l
CH3-CH-CH2-CH3
d. CH3
l
CH3-C-CH3
l
CH3

Explain the reasoning behind your answer for the above question:

10. Propane boils at -42°C, butane at 0°C, and pentane at 36°C. They are all straight chain organic molecules. Which one is the largest molecule?

a) Propaneb) Butanec) Pentane

11.a.Rank the following from lowest vapor pressure to highest vapor pressure.

NaCl, CH4(g), H2O, Br2(l)

b. Justify your answer.

12. A liquid will boil when the ______equals the ______.

Vapor pressure = ______

External pressure = ______

13. Solubility and Polarity

Is the unknown solution most likely

polar or nonpolar? How do you know?

Will solute "C" dissolve in water?

Will solute "B" dissolve in oil?

Unit 6 – Chemical Reactions

14. Identify the type of reaction and balance the equation.

A. ____ C5H9O + ____ O2 ____ CO2 + ____ H2OReaction Type : ______

B. ___ NH3+ ___H2SO4 ____(NH4)2SO4 Reaction Type : ______

C. ___Pb + ____ H3PO4___ H2 + ___Pb3(PO4)2 Reaction Type : ______

D. ___Li3N + ___ NH4NO3___ LiNO3 + ___(NH4)3N Reaction Type : ______

E. ___HBr + ___Al(OH)3___H2O + ___AlBr3 Reaction Type : ______