CHEM - Chapter 4: Aqueous Reactions and Solution Stoichiometry

CHEM - Chapter 4: Aqueous Reactions and Solution Stoichiometry hemistry, 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 HC H O 2 3 2 3 NH KCl A) HCl, KCl B) HCl, 3 NH , KCl C) HCl, HC H O 2 3 2 , 3 NH , KCl D) HCl, HC H O 2 3 2 , KCl E) HC H O 2 3 2 , KCl Answer: A Diff: 2 Page Ref: Sec. 4.1 5) Which of the following are weak electrolytes? HCl HC H O 2 3 2 3 NH KCl A) HCl , KCl B) HCl , HC H O 2 3 2 , 3 NH , KCl C) HC H O 2 3 2 , KCl D) HC H O 2 3 2 , 3 NH E) HCl , HC H O 2 3 2 , 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 HNO (aq)? 3 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 H O K F 2 + − + → + + B) HF OH H O F 2 − − + → + C) HF K OH H O KF 2 + − + + → + D) 2 H OH H O + − + → E) 2 H F K OH H O K F + − + − + − + + + → + + Answer: B Diff: 2 Page Ref: Sec. 4.2 8) Combining aqueous solutions of BaI and Na SO 2 2 4 affords a precipitate of BaSO4 . Which ion(s) is/are spectator ions in the reaction? A) 2 Ba only + B) Na only + C) 2 2 Ba and SO4 + − D) + Na and I− E) 2 SO and I 4 − − Answer: D Diff: 2 Page Ref: Sec. 4.2 Chemist