Download EXAM 3 CHEM 1310 WS11 Key Version #1 1. (p. 125) Which one of

EXAM 3 CHEM 1310 WS11 Key
Version #1
1. (p. 125) Which one of the following is not a redox reaction?
A. 2H2(g) + O2(g)  2H2O(l)
B. Zn(s) + H2SO4(aq)  ZnSO4(aq) + H2(g)
C. 6FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq)  Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(l)
D. H2O(l) + NH3(g)  NH4+(aq) + OH-(aq)
E. Cl2(g) + 2KBr(aq)  Br2(l) + 2KCl(aq)
2. (p. 125) Which one of the following is not a redox reaction?
A. H2(g) + Cl2(g)  2HCl(g)
B. 2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq)  K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4)3(aq) + 8H2O(l)
C. 2H2O2(aq)  2H2O(l) + O2(g)
D. 2Na(s) + 2H2O(l)  2NaOH(aq) + H2(g)
E. Fe2O3(s) + 3H2SO4(aq)  Fe2(SO4)3(aq) + 3H2O(l)
3. (p. 119) Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid.
LiOH(aq) + HBr(aq)  H2O(l) + LiBr(aq)
A. H+(aq) + OH-(aq)  H2O(l)
B. Li+(aq) + Br-(aq)  LiBr(aq)
C. LiOH(aq)  Li+(aq) + OH-(aq)
D. Li+(aq) + OH-(aq) + H+(aq) + Br-(aq)  H2O(l) + LiBr(aq)
E. HBr(aq)  H+(aq) + Br-(aq)
4. (p. 96) How many mL of concentrated nitric acid (HNO3, 16.0 M) should be diluted with water in order to make
2.00 L of 2.00 M solution?
A. 62.5 mL
B. 250. mL
C. 32.0 mL
D. 500. mL
E. 125 mL
5. (p. 116) Select the precipitate that forms when the following reactants are mixed.
Na2CO3(aq) + BaCl2(aq) 
A. BaO
B. NaCl2
C. BaCO3
D. Ba2CO3
E. NaCl
6. Chlorine gas can be made from the reaction of manganese dioxide with hydrochloric acid.
MnO2(s) + 4HCl(aq)  MnCl2(aq) + 2H2O(l) + Cl2(g)
According to the above reaction, which is the limiting reagent when 28 g of MnO2 are reacted with 42 g of
HCl?
A. MnCl2
B. MnO2
C. HCl
D. Cl2
E. No limiting reagent.
7. (p. 96) What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a
concentration of 2.40 M?
A. 210 mL
B. 60 mL
C. 330 mL
D. 86 mL
E. 7.3 mL
8. (p. 111) Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and
ammonium phosphate, (NH4)3PO4, are soluble in water. Which one produces the largest number of dissolved
particles per mole of dissolved solute?
A. KCl
B. Na2SO4
C. (NH4)3PO4
D. CO2
E. C6H12O6
9. (p. 120) Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to
neutralize 225 mL of battery acid?
H2SO4(aq) + 2NaOH(aq)  2H2O(l) + Na2SO4(aq)
A. 0.045 L
B. 0.90 L
C. 0.28 L
D. 0.56 L
E. 1.1 L
10. (p. 114) In the following reaction, what ions, if any, are spectator ions?
Pb(NO3)2(aq) + 2NaCl(aq)  PbCl2(s) + 2NaNO3(aq)
A. Na+(aq), NO3-(aq)
B. Pb2+(aq), Cl-(aq)
C. Pb2+(aq), NO3-(aq)
D. There are no spectator ions
E. Na+(aq), Cl-(aq)
11. (p. 111) How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in
water?
A. 0.090 mol
B. 0.18 mol
C. 0.27 mol
D. 0.54 mol
E. 0.81 mol
12. (p. 125) Sodium thiosulfate, Na2S2O3, is used as a "fixer" in black and white photography. Identify the
reducing agent in the reaction of thiosulfate with iodine.
2S2O32-(aq) + I2(aq)  S4O62-(aq) + 2I-(aq)
A. I-(aq)
B. S2O32-(aq)
C. S4O62-(aq)
D. I2(aq)
E. S2O32-(aq) and I-(aq)
13. (p. 116) Select the correct name and chemical formula for the precipitate that forms when the following
reactants are mixed.
CoSO4(aq) + (NH4)3PO4(aq) 
A. cobalt(II) phosphate, CoPO4
B. ammonium sulfate, (NH4)2SO4
C. cobalt(III) phosphate, Co3(PO4)2
D. cobalt(II) phosphate, Co3(PO4)2
E. cobalt(III) phosphate, CoPO4
14. (p. 125) Identify the oxidizing agent in the following redox reaction.
Hg2+(aq) + Cu(s)  Cu2+(aq) + Hg(l)
A. Cu(s)
B. Hg2+(aq) and Cu2+(aq)
C. Cu2+(aq)
D. Hg2+(aq)
E. Hg(l)
15. (p. 125) Calculate the oxidation number of sulfur in sodium metabisulfite, Na2S2O5.
A. +5
B. -2
C. +4
D. +2
E. None of these is the correct oxidation number.
16. (p. 116) Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II)
nitrate.
A. Cu2S
B. NH4(NO3)2
C. NH4NO3
D. CuS
E. CuSO4