General Chemistry Chapter 4 Answer Key

Chapter 4 General Chemistry Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The total concentration of ions in a 0.250 M solution of HCI is 1) A) 0,250 M B) 0.500 M C) 0.750 M D) essentially zero. E) 0.125 M 2) A strong electrolyte is one that completely in solution. A) ionizes B) reacts C) disappears D) decomposes 2) 3) A weak electrolyte exists predominantly as in solution. 3) A) an isotope B) electrons C) ions D) atoms E) molecules 4) Which of the following are strong electrolytes? HCI HC2H302 NH3 KCI A) HCL, KCI B) HCL, NH3, KCI C) HCI, HC2H302, KCI D) HC2H302, KCI E) HCL, HC2H302, NH3, KCI 5) Which of the following are weak electrolytes? 1) HCI 2) HC2H302 3) NH3 4) KCI A) HC2H3O2, NH3 B) HCI, HC2H302, KCI C) HCI, HC2H302, NH3, KCI D) HCI, KCI E) HC2H3O2, KI 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) OH- only E) H and NO3 5) 6) 7) The net ionic equation for the reaction between aqueous solutions of HF and KOH is. 7) A) H+ + OH H2O B) HF+ KOH H2O KF- C) HF OH H2O+F D) HF+K++ OH H2O+ KF E) HF KOH H2O+ K+ F 8) Combining aqueous solutions of Balz and Na2SO4 affords a precipitate of BaSO4. Which ion(s) is/are spectator ions in the reaction? 8) A) Na and 1 B) Na+ only C) Ba2+ only D) Ba2+ and SO42- E) SO42- and 1- 9) Which ion(s) is/are spectator ions in the formation of a precipitate of AgCI via combining aqueous solutions of CoCl2 and AgNO3? 9) A) NO3- B) Co2+ and NO3- D) NO3- and Cl- E) Co2+ and Ag+ 10) The balanced net ionic equation for precipitation of CaCO3 when aqueous solutions of Na2CO3 and CaCl2 are mixed is 10) A) Na2CO3 (aq) CaCl2 (aq) 2NaCl (aq) + CaCO3 (5) B) 2Na+ (aq) CO32-(aq) Na2CO3 (aq) C) Na (aq) Cl(aq) NaCl (aq) D) 2Na+ (aq) + 2Cl-(aq) → 2NaCl (aq) E) Ca2+ (aq) + CO32-(aq) CaCO3 (5) 11) When aqueous solutions of AgNO3 and Kl are mixed, Agl precipitates. The balanced net ionic equation is 11) A) Ag+ (aq) + NO3(aq) AgNO3 (aq) B) Ag+ (aq) 1 (aq) AgI (5) C) AgNO3 (aq) KI (aq) Agl (s) + KNO3 (aq) D) AgNO3 (aq) KI (aq) Agl (aq) + KNO3 (3) E) Ag+ (aq) + NO3 (aq) AgNO3 (8) 12) When H2SO4 is neutralized by NaOH in aqueous solution, the net ionic equation is 12) A) 2H+ (aq) 2NaOH (aq) 2H2O (1) 2Na+ (aq) B) H2SO4 (aq) + 2OH (aq) 2H2O (1) + SO42-(aq) C) SO42-(aq) + 2Na+ (aq) Na2SO4 (8) D) H+ (aq) + OH (aq) H2O (1) E) SO42-(aq) + 2Na+ (aq) Na2SO4 (aq) 13) The spectator ions in the reaction between aqueous perchloric acid and aqueous barium hydroxide are 13) A) H+ and Ba2+ B) OH- and CI04- C) H, OH, CIO4, and Ba2+ D) H+ and OH- E) CIO4 and Ba2+ 14) The spectator ions in the reaction between aqueous hydrofluoric acid and aqueous barium hydroxide are 14) A) H+, OH-, F, and Ba2+ B) F- and Ba2+ C) OH-, F, and Ha2+ D) Ba2+ only E) OH- and F- 15) The spectator ions in the reaction between aqueous hydrochloric acid and aqueous ammonia are 15) A) H+, CH, NH3, and NH4+ B) C only C) Cl and NH4+ D) H+, Ch, and NH4+ E) H* and NH3 16) Which of the following are strong acids? HI HNO3 HF HBr A) HI, HF, HBr B) HF, HBr C) HNO3, HF, HBr D) HI, HNO3, HF, HBr E) HI, HNO3, HBr 17) Which hydroxides are strong bases? Sr(OH)2 KOH NaOH Ba(OH)2 A) KOH, Ba(OH)2 B) KOH, NaOH, Ba(OH)2 C) Sr(OH)2, KOH, NaOH, Ba(OH)2 D) KOH, NaOH E) None of these is a strong base. 18) A neutralization reaction between an acid and a metal hydroxide produces A) water and a salt B) ammonia C) hydrogen gas D) oxygen gas E) sodium hydroxide 19) Of the metals below, only will not dissolve in an aqueous solution containing nickel 19) ions. aluminum chromium barium tin potassium A) barium 17) 18) B) potassium tin D) chromium E) aluminum 20) 20) Which of these metals is the least easily oxidized? Na Au Fe Ca Ag A) Ca B) Au C) Na D) Ag E) Fe