Student Must Show All Calculations

CHE 1100. Homework 7

Name ______Due date October 26 Student must show all calculations

1.Which compound is insoluble in water?

a. Na2CO3 b. NH4NO3 c. CaCO3 d. CaCl2 e. LiClO4

2. What is the net ionic equation for the reaction between HCl and NaHCO3?

a. H2CO3(aq)  H2O + CO2(g) - b. HCl(aq) + HCO3 (aq)  H2O + CO2(g) + - c. H (aq) + HCO3 (aq)  H2O + CO2(g) + - d. H2O + CO2(g)  H (aq) + HCO3 (aq) + + e. H (aq) + NaHCO3(aq)  Na (aq) + H2O + CO2(g)

3. What is the net ionic equation for the reaction between HNO3 and Na2SO3?

a. H2SO3(aq)  H2O + SO2(g) - b. HNO3(aq) + Na2SO3(aq)  H2O + SO2(g) + NO3 (aq) + 2- c. 2H (aq) + SO3 (aq)  H2O + SO2(g) + - d. H2O + SO2(g)  H (aq) + HSO3 (aq) + + e. 2H (aq) + Na2SO3(aq)  2Na (aq) + H2O + SO2(g)

4. Which set of compounds are all insoluble in water?

a. BaSO4, BaCl2, BaCO3, and Ba(OH)2 b. CrSO4, CrCl2, Cr(ClO4)2, and Cr(OH)2 c. Na2SO4, NaCl, Na2CO3, and NaOH d. NiSO4, NiCl2, Ni(C2H3O2)2, and NiCO3 e. PbSO4, PbCl2, PbCO3, and Pb(OH)2

5. Which of the following is an example of a precipitation reaction?

a. The reaction between barium hydroxide and nitric acid. b. The reaction between calcium chloride and nitric acid. c. The reaction between barium hydroxide and sodium chloride. d. The reaction between barium chloride and sodium sulfate. e. The reaction between sodium carbonate and hydrochloric acid.

1 CHE 1100. Homework 7

6. An acidbase neutralization is the reaction of

a. H2(g) with O2(g) to form H2O(l) b. H2(aq) with OH(aq) to form H2O(l) + c. H (aq) with O2(g) to form H2O(l) + d. H (aq) with OH(aq) to form H2O(l) e. Na+(aq) with OH(aq) to form NaOH(aq)

7. The reaction, BaCl2(aq) + H2SO4(aq)  BaSO4(s) + 2 HCl(aq), is an example of a

a. double replacement reaction b. neutralization reaction c. precipitation reaction d. redox reaction e. a and c

8. Which is the net ionic equation for the reaction which takes place when HClO3(aq) is added to KOH(aq)?

a. HClO3(aq) + KOH(aq)  KClO3(aq) + H2O(l) + - b. H (aq) + OH (aq)  H2O(l) - - c. HClO3(aq) + OH (aq)  ClO3 (aq) + H2O(l) + + d. H (aq) + KOH(aq)  K (aq) + H2O(l) + + e. HClO3(aq) + K (aq)  KClO3(aq) + H (aq)

9. What is the net ionic equation for the reaction between HCl and NaHCO3?

a. H2CO3(aq)  H2O + CO2(g) - b. HCl(aq) + HCO3 (aq)  H2O + CO2(g) + - c. H (aq) + HCO3 (aq)  H2O + CO2(g) + - d. H2O + CO2(g)  H (aq) + HCO3 (aq) + + e. H (aq) + NaHCO3(aq)  Na (aq) + H2O + CO2(g)

10. Which is the net ionic equation for the reaction which takes place when HNO3(aq) is added to Mg(OH)2(s)?

a. HNO3(aq) + Mg(OH)2(s)  Mg(NO3)2(aq) + H2O(l) + - b. H (aq) + OH (aq)  H2O(l) - - c. HNO3(aq) + OH (s)  NO3 (aq) + H2O(l) + 2+ d. 2H (aq) + Mg(OH)2(s)  Mg (aq) + 2H2O(l) 2+ + e. HNO3(aq) + Mg (aq)  Mg(NO3)2(aq) + H (aq)

11. ZnCO3(s) is insoluble in water, but dissolves in excess 6.0 molar HCl(aq). Which equation best describes the reaction?

2+ 2 a. ZnCO3(s)  Zn (aq) + CO3 (aq)

b. ZnCO3(s) + H2O(l)  ZnO(aq) + H2CO3(aq) + 2+ c. ZnCO3(s) + 2 H (aq)  Zn (aq) + H2O(l) + CO2(g)

d. ZnCO3(s) + 2 H2O(l)  Zn(OH)2(aq) + H2CO3(aq)

e. ZnCO3(s) + 2 H2O(l)  Zn(OH)2(aq) + H2O(l) +CO2(g)

12. Which is the net ionic equation for the reaction which takes place when HNO3(aq) is added to Fe2O3(s)?

a. HNO3(aq) + Fe2O3(s)  Fe(NO3)3(aq) + H2O(l) + - b. H (aq) + OH (aq)  H2O(l) - - c. HNO3(aq) + OH (s)  NO3 (aq) + H2O(l) + 3+ d. 6H (aq) + Fe2O3(s)  2Fe (aq) + 3H2O(l) 3+ + e. HNO3(aq) + Fe (aq)  Fe(NO3)3(aq) + H (aq)

13. Which is the net ionic equation for the reaction which takes place when Ba(OH)2(aq) is added to NH4Cl(aq)?

+ - * a. NH4 (aq) + OH (aq)  NH3(aq) + H2O(l) + 2+ b. NH4 (aq) + Ba(OH)2(aq)  Ba (aq) + NH3(aq) + H2O(l) - - c. NH4Cl(aq) + OH (aq)  NH3(aq) + H2O(l) + Cl (aq) d. H+(aq) + Cl-(aq)  HCl(aq)

e. Ba(OH)2(aq) + NH4Cl(aq)  BaCl2(aq) + NH4OH(aq)

14. Zinc metal reacts with aqueous hydrochloric acid to give an aqueous solution of zinc chloride and hydrogen gas. Select the correct balanced chemical equation for this reaction.

a. Zn(s) + HCl(aq) ® 3ZnCl(aq) + H2(g) b. Zn(s) + HCl(g) ® ZnCl(aq) + H(g)

c. Zn(s) + 2HCl(aq) ® ZnCl2(aq) + H2(g)

d. 2Zn(s) + 4HCl(aq) ® 2ZnCl2(aq) + H2(g)

e. 2Zn(s) + HCl(aq) ® 2ZnCl2(aq) + H2(g)

15. What is the net ionic equation for the reaction between HNO3 and Na2SO3?

a. H2SO3(aq)  H2O + SO2(g) - b. HNO3(aq) + Na2SO3(aq)  H2O + SO2(g) + NO3 (aq) + 2- c. 2H (aq) + SO3 (aq)  H2O + SO2(g) + - d. H2O + SO2(g)  H (aq) + HSO3 (aq) + + e. 2H (aq) + Na2SO3(aq)  2Na (aq) + H2O + SO2(g)

16. Oxidation is defined as

a. gain of a proton. b. loss of a proton. c. gain of an electron. d. loss of an electron. e. capture of an electron by a neutron.

17. Reduction is defined as a. gain of a proton. b. loss of an electron. c. gain of an electron. d. gain of a neutron. e. loss of a proton.

18. What is the oxidation number of chlorine in HClO4?

a. 1 b. +3 c. +5 d. +7 e. +9 19. The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Which reaction below occurs spontaneously upon mixing the reagents shown?

a. Ag(s) + Zn2+(aq) ® Ag+(aq) + Zn(s) b. Ag(s) + Cd2+(aq) ® Ag+(aq) + Cd(s) c. Zn(s) + Mg2+(aq) ® Zn2+(aq) + Mg(s) d. Ag(s) + Mg2+(aq) ® Ag+(aq) + Mg(s) e. Sn(s) + Cu2+(aq) ® Sn2+(aq) + Cu(s)

20. Which statement is true concerning an oxidation-reduction reaction?

a. The reactant which is reduced is the reducing reagent. b. The reactant which is oxidized is the reducing reagent. c. The reactant which gains electrons is the reducing reagent. d. The reactant which loses electrons is the oxidizing reagent. e. None of the statements, a—d, is true. 21. Which statement is true concerning an oxidation-reduction reaction?

a. The reactant which is reduced is the oxidizing reagent. b. The reactant which is oxidized is the oxidizing reagent. c. The reactant which gains electrons is the reducing reagent. d. The reactant which loses electrons is the oxidizing reagent. e. None of the statements, a—d, is true.