Chemistry 211 Name: ____________________
Fall 2007 Please Print
Test 2
Multiple Choice/Short Answer: (4 points each. Put answers in left margin as capital letters.)
1. Which of the following would be a strong electrolyte in aqueous solution?
a) CCl4 b) HC2H3O2 c) Hg2Cl2 d) P2O5 e) N2
2. What is the concentration of a solution of 4.28 g calcium nitrate in 300.0 mL of water?
a) 0.0261 M b) 0.0419 M c) 0.0869 M d) 0.0961 M e) 0.140 M
3. What is the oxidation number of nitrogen in calcium nitrate?
a) -3 b) -1 c) +1 d) +3 e) +5
4. Which of the following is false?
a) The liquid present in largest quantity in a solution is the solvent.
b) Substances that lose electrons are oxidized.
c) Electrolytes are substances that form ions when dissolved in water.
d) Weak electrolytes are substances that do not completely ionize in water.
e) Dilution is process of making a solution more concentrated.
5. For enthalpy calculations, the standard state conditions are
a) 0ºC, 1 atm c) 273 K, 1 atm e) 0 K, 1 atm
b) 0ºC, 0 atm d) 25ºC, 1 atm
6. Which of the following sets of conditions possesses the greatest amount of kinetic energy?
(FYI: All speeds are approximately correct for the sport.)
a) a 2 kg bowling ball traveling at 103 m/hr d) a 500 g basketball traveling at 103 m/hr
b) a 10 kg shot put traveling at 104 m/hr e) a 500 g volleyball traveling at 105 m/hr
c) a 25 g racquetball traveling at 105 m/hr
7. Which of the following represents a heat of formation reaction?
a) 2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O(l)
b) CaO (s) + H2O(l) → Ca(OH)2 (s)
c) 2 HgO2 → 2 Hg(l) + O2 (g)
d) Ca(s) + Cl2 (g) → CaCl2 (s)
8. Provide the formula of ammonium carbonate:
9. Name ICl3:
