Test Bank For Chemistry

Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapt
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4.1 Multiple-Choice and Bimodal Questions

1) The total concentration of ions in a 0.250 M solution of HCl is __________.

A) essentially zero.
B) 0.125 M
C) 0.250 M
D) 0.500 M
E) 0.750 M


Answer: D
Diff: 1
Page Ref: Sec. 4.1


2) A strong electrolyte is one that __________ completely in solution.

A) reacts
B) associates
C) disappears
D) ionizes


Answer: D
Diff: 2
Page Ref: Sec. 4.1


3) A weak electrolyte exists predominantly as __________ in solution.

A) atoms
B) ions
C) molecules
D) electrons
E) an isotope


Answer: C
Diff: 2
Page Ref: Sec. 4.1




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,Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapt
er4:Aque
ousRe
act
ionsandSol
uti
onSt
oic
hiome
try



4) Which of the following are strong electrolytes?
HCl
HC2 H 3 O 2
NH 3
KCl

A) HCl, KCl
B) HCl, NH 3 ,KCl
C) HCl, HC 2 H 3 O 2 , NH 3 , KCl
D) HCl, HC 2 H 3 O 2 , KCl
E) HC2 H 3 O 2 , KCl


Answer: A
Diff: 2
Page Ref: Sec. 4.1


5) Which of the following are weak electrolytes?
HCl
HC2 H 3 O 2
NH 3
KCl

A) HCl , KCl
B) HCl , HC 2 H 3 O 2 , NH 3 , KCl
C) HC 2 H 3 O 2 , KCl
D) HC 2 H 3 O 2 , NH 3
E) HCl , HC 2 H 3 O 2 , KCl


Answer: D
Diff: 2
Page Ref: Sec. 4.1




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,Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapt
er4:Aque
ousRe
act
ionsandSol
uti
onSt
oic
hiome
try

6) What are the spectator ions in the reaction between KOH (aq) and HNO3 (aq)?

A) K and H 
B) H + and OH 
C) K and NO 3
D) H and NO 3
E) OH  only


Answer: C
Diff: 2
Page Ref: Sec. 4.2


7) The net ionic equation for the reaction between aqueous solutions of HF and KOH is
__________.

 
A) HF  KOH  H 2 O  K  F
 
B) HF  OH  H 2 O  F
 
C) HF  K  OH  H 2 O  KF
 
D) H  OH  H 2 O
     
E) H  F  K  OH  H 2 O  K  F

Answer: B
Diff: 2
Page Ref: Sec. 4.2


8) Combining aqueous solutions of BaI 2 and Na 2 SO 4 affords a precipitate of BaSO 4 .
Which ion(s) is/are spectator ions in the reaction?

A) Ba 2 only
B) Na  only
C) Ba 2and SO 4 2
D) Na +and I 
E) SO 4 2 and I 


Answer: D
Diff: 2
Page Ref: Sec. 4.2




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, Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapt
er4:Aque
ousRe
act
ionsandSol
uti
onSt
oic
hiome
try

9) Which ion(s) is/are spectator ions in the formation of a precipitate of AgCl via
combining aqueous solutions of CoCl 2 and AgNO 3 ?

A) Co 2+ and NO 3
B) NO 3 and Cl 
C) Co 2+ and Ag +
D) Cl 
E) NO 3


Answer: A
Diff: 2
Page Ref: Sec. 4.2


10) The balanced net ionic equation for precipitation of CaCO 3 when aqueous solutions
of Na 2 CO 3 and CaCl 2 are mixed is __________.

+ 2
A) 2Na (aq)  CO3 (aq)  Na 2 CO 3 (aq)
B) 2 Na + (aq)  2Cl  (aq)  2NaCl (aq)
C) Na + (aq)  Cl  (aq)  NaCl (aq)
2+ 2
D) Ca (aq)  CO 3 (aq)  CaCO 3 (s)
E) Na 2 CO 3 (aq)  CaCl 2 (aq)  2NaCl (aq)  CaCO 3 (s)


Answer: D
Diff: 3
Page Ref: Sec. 4.2




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