Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
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
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
4) Which of the following are strong electrolytes? HCl
HC2H3O2 NH3 KCl
A) HCl, KCl
B) HCl, NH3 , KCl
C) HCl, HC2H3O2, NH3 , KCl D) HCl, HC2H3O2, KCl
E) HC2H3O2, KCl
Answer: A Diff: 2
Page Ref: Sec. 4.1
5) Which of the following are weak electrolytes? HCl
HC2H3O2
NH3
KCl
A) HCl , KCl
B) HCl , HC2H3O2 , NH3 , KCl C) HC2H3O2 , KCl D) HC2H3O2 , NH3 E) HCl , HC2H3O2 , KCl
Answer: D Diff: 2
Page Ref: Sec. 4.1
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
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 NO3? D) H?and NO3? 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 ?H2O?K??F? B) HF?OH??H2O? F? C) HF?K??OH??H2O ?KF D) H??OH??H2O
E) H?? F?? K?? OH? ?H2O ?K??F?
Answer: B Diff: 2
Page Ref: Sec. 4.2
8) Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4. Which ion(s) is/are spectator ions in the reaction?
A) Ba2?only B) Na?only
C) Ba2?and SO42? D)Na+and I? E) SO42?and I?
Answer: D Diff: 2
Page Ref: Sec. 4.2
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
9) Which ion(s) is/are spectator ions in the formation of a precipitate of AgCl via combining aqueous solutions of CoCl2 and AgNO3?
A) Co2+ and NO3? B) NO3? and Cl? C) Co2+and Ag+ D) Cl? E) NO3?
Answer: A Diff: 2
Page Ref: Sec. 4.2
10) The balanced net ionic equation for precipitation of CaCO3when aqueous solutions of Na2 CO3 and CaCl2are mixed is __________.
A) 2Na+(aq)?CO32?(aq)?Na2 CO3 (aq) B) 2 Na+(aq)?2Cl?(aq) ?2NaCl (aq) C) Na+(aq)?Cl?(aq) ?NaCl (aq) D) Ca2+(aq)?CO32?(aq) ?CaCO3(s)
E) Na2CO3(aq) ?CaCl2 (aq)?2NaCl (aq)?CaCO3(s)
Answer: D Diff: 3
Page Ref: Sec. 4.2
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
11) When aqueous solutions of AgNO3 and KI are mixed, AgI precipitates. The balanced net ionic equation is __________.
A) Ag?(aq) + I?(aq)?AgI (s) )
B) Ag?(aq) ?NO3?(aq) ?AgNO3(s) C) Ag?(aq) ?NO3?(aq) ?AgNO3(aq)
D) AgNO3(aq)?KI (aq)?AgI (s) ? KNO3(aq) E) AgNO3(aq)?KI (aq)?AgI (aq) ? KNO3(s)
Answer: A Diff: 3
Page Ref: Sec. 4.2
12) When H2SO4 is neutralized by NaOH in aqueous solution, the net ionic equation is __________.
A) SO42?(aq)?2Na+(aq)?Na2SO4(aq) B) SO42?(aq)?2Na+(aq)?Na2SO4(s) C) H?(aq)?OH?(aq)?H2O (l)
D) H2SO4(aq)?2OH?(aq)?2H2O (l)?SO42?(aq) E) 2H?(aq) ?2NaOH (aq)?2H2O (l) ?2Na+(aq)
Answer: C Diff: 2
Page Ref: Sec. 4.2