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3. Solutions of sodium iodide and lead nitrate are mixed. I - + Pb 2+  PbI 2

Double Replacement 1. Hydrogen sulfide is bubbled through a solution of silver nitrate. H 2 S(g) + AgNO 3 (aq) --> HNO 3 (aq) + Ag 2 S(s) H 2 S + Ag + + NO 3 - --> H + +NO 3 - + Ag 2 S H 2 S + Ag +  H + + Ag 2 S.

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3. Solutions of sodium iodide and lead nitrate are mixed. I - + Pb 2+  PbI 2

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  1. Double Replacement1. Hydrogen sulfide is bubbled through a solution of silver nitrate.H2S(g) + AgNO3(aq) --> HNO3(aq) + Ag2S(s)H2S + Ag+ + NO3- --> H+ +NO3- + Ag2SH2S + Ag+ H++Ag2S

  2. 2. An excess of sodium hydroxide solution is added to a solution of magnesium nitrate.OH- + Mg2+ Mg(OH)2

  3. 3. Solutions of sodium iodide and lead nitrate are mixed.I- + Pb2+  PbI2

  4. 4. A solution of ammonia is added to a solution of ferric chloride.NH3(g) + H2O(l) + FeCl3(aq) --> NH4Cl(aq) + Fe(OH)3(s)NH3 + H2O + Fe3+ + Cl- NH4+ + Cl- + Fe(OH)3NH3 + H2O + Fe3+ NH4+ + Fe(OH)3

  5. 5. Solutions of silver nitrate and sodium chromate are mixed.Ag+ + CrO42- Ag2CrO4

  6. 6. Excess silver acetate is added to a solution of trisodium phosphate.Ag+ + PO43- Ag3PO4

  7. 7. Manganese(II) nitrate solution is mixed with sodium hydroxide solution.Mn2+ + OH- Mn(OH)2

  8. 8. A saturated solution of calcium hydroxide is added to a solution of magnesium chloride.Mg2+ + OH-  Mg(OH)2

  9. 9. Hydrogen sulfide gas is added to a solution of cadmium nitrate. H2S + Cd2+ CdS + H+

  10. 10. Dilute sulfuric acid is added to a solution of barium acetate. H+ + SO42- + Ba2+ + C2H3O2-  BaSO4 + HC2H3O2

  11. 11. A precipitate is formed when solutions of trisodium phosphate and calcium chloride are mixed. PO43- + Ca2+Ca3(PO4)2

  12. 12. A solution of copper(II) sulfate is added to a solution of barium hydroxide. Cu2+ + SO42- + Ba2+ + OH- Cu(OH)2 + BaSO4

  13. 13. Equal volumes of dilute equimolar solutions of sodium carbonate and hydrochloric acid are mixed. Na2CO3(aq) + HCl(aq) --> NaCl(aq) + NaHCO3(aq)2Na+ + CO32- + H+ +Cl- --> Na+ + Cl- + Na+ + HCO3-H+ + CO32- HCO3-

  14. 14. Solid barium peroxide is added to cold dilute sulfuric acid.BaO2(s) + H2SO4(aq) --> BaSO4(s) + H2O2(l)BaO2 +H+ + SO42- BaSO4 + H2O2

  15. 15. Excess hydrochloric acid solution is added to a solution of potassium sulfite.HCl(aq) + K2SO3(aq) --> H2O(l) + SO2(g) + KCl(aq)H+ + Cl- + K+ + SO32- --> H2O + SO2 + K+ + Cl-H+ + SO32- H2O + SO2

  16. 16. Dilute sulfuric acid is added to a solution of barium chloride.H2SO4(aq) + BaCl2(aq) --> HCl(aq) + BaSO4(s)H+ + SO42- + Ba2+ + Cl- --> H+ + Cl- + BaSO4SO42- + Ba2+ BaSO4

  17. 17. A solution of sodium hydroxide is added to a solution of ammonium chloride.NaOH(aq) + NH4Cl(aq) --> NaCl(aq) + NH3(g) + H2O(l)Na+ + OH- + NH4+ + Cl- --> Na+ + Cl- + NH3 + H2ONH4+ + OH- NH3 + H2O

  18. 18. Dilute hydrochloric acid is added to a solution of potassium carbonate.HCl(aq) + K2CO3(aq) --> H2O(l) + CO2(g) + KCl(aq)H+ + Cl- + K+ + CO32- --> H2O + CO2 + K+ + Cl-H+ + CO32- H2O + CO2

  19. 19. Gaseous hydrogen sulfide is bubbled through a solution of nickel(II) nitrate.H2S(g) + Ni(NO3)2(aq) --> HNO3(aq) + NiS(s)H2S + Ni2+ + NO3- --> H+ + NO3- + NiSH2S + Ni2+ NiS + H+

  20. 20. A solution of sodium sulfide is added to a solution of zinc nitrate.Na2S(aq) + Zn(NO3)2(aq) --> NaNO3(aq) + ZnS(s)Na+ + S2- + Zn2+ + NO3- --> Na+ + NO3- + ZnSS2- + Zn2+ ZnS

  21. 21. Concentrated hydrochloric acid is added to solid manganese(II) sulfide.H+ + MnS  H2S + Mn2+

  22. 22. Solutions of tri-potassium phosphate and zinc nitrate are mixed.PO43- + Zn2+ Zn3(PO4)2

  23. 23. Dilute acetic acid solution is added to solid magnesium carbonate.HC2H3O2 + MgCO3  H2O + CO2 + Mg2+ + C2H3O2-

  24. 24. Gaseous hydrofluoric acid reacts with solid silicon dioxide.HF + SiO2 H2O + SiF4

  25. 25. Equimolar amounts of trisodium phosphate and hydrogen chloride, both in solution, are mixed.PO43- + H+ HPO42-

  26. 26. Ammonium chloride crystals are added to a solution of sodium hydroxide.NH4Cl + OH- NH3 + H2O + Cl-

  27. 27. Hydrogen sulfide gas is bubbled through a solution of lead(II) nitrate. H2S + Pb2+ PbS + H+

  28. 28. Solutions of silver nitrate and sodium chromate are mixed.Ag+ + CrO42- Ag2CrO4

  29. 29. Solutions of sodium fluoride and dilute hydrochloric acid are mixed.F- + H+ HF

  30. 30. A saturated solution of barium hydroxide is mixed with a solution of iron(III) sulfate.Ba2+ + OH- + Fe3+ + SO42- BaSO4 + Fe(OH)3

  31. 31. A solution of ammonium sulfate is added to a potassium hydroxide solution.NH4+ + OH- NH3 + H2O

  32. 32. A solution of ammonium sulfate is added to a saturated solution of barium hydroxide.NH4+ + SO42- + Ba2+ +OH- NH3 + H2O + BaSO4

  33. 33. Dilute sulfuric acid is added to solid calcium fluoride.H+ + SO42- + CaF2 CaSO4 + HF

  34. 34. Dilute hydrochloric acid is added to a dilute solution of mercury(I) nitrate.Cl- + Hg22+ Hg2Cl2

  35. 35. Dilute sulfuric acid is added to a solution of lithium hydrogen carbonate.H+ + HCO3-  H2O + CO2

  36. 36. Dilute hydrochloric acid is added to a solution of potassium sulfite.H+ + SO32- H2O + SO2

  37. 37. Carbon dioxide gas is bubbled through water containing a suspension of calcium carbonate.CO2 + CaCO3 + H2O HCO3- + Ca2+

  38. 38. Excess concentrated sulfuric acid is added to solid calcium phosphate.H2SO4 + Ca3(PO4)2 H3PO4 + CaSO4(or Ca2+ + SO42-)

  39. 39. Hydrogen sulfide gas is bubbled into a solution of mercury(II) chloride.H2S + Hg2+ HgS + H+

  40. 40. Solutions of zinc sulfate and sodium phosphate are mixed.Zn2+ + PO43---> Zn3(PO4)2

  41. 41. Solutions of silver nitrate and lithium bromide are mixed.Ag+ + Br- --> AgBr

  42. 42. Solutions of manganese(II) sulfate and ammonium sulfide are mixed.Mn2+ + S2- --> MnS

  43. 43. Excess hydrochloric acid solution is added to a solution of potassium sulfite. H+ + SO32- --> H2O + SO2

  44. SingleReplacement1. A piece of aluminum metal is added to a solution of silver nitrate.Al(s) + AgNO3(aq) --> Al(NO3)3(aq) + Ag(s)Al + Ag+ + NO3- --> Al3+ + NO3- + AgAl + Ag+ Al3+ + Ag

  45. 2. Aluminum metal is added to a solution of copper(II) chloride.Al(s) + CuCl2(aq) --> Cu(s) + AlCl3(aq)Al + Cu2+ + Cl- --> Cu + Al3+ + Cl-Al + Cu2+ Al3+ + Cu

  46. 3. Hydrogen gas is passed over hot copper(II) oxide.H2 + CuO  H2O + Cu

  47. 4. Small chunks of solid sodium are added to water.Na + H2O  Na+ + OH- + H2

  48. 5. Calcium metal is added to a dilute solution of hydrochloric acid.Ca + H+ Ca2+ + H2

  49. 6. Magnesium turnings are added to a solution of iron(III) chloride.Mg + Fe3+ Mg2+ + Fe

  50. 7. Chlorine gas is bubbled into a solution of sodium bromide.Cl2 + Br- Cl- + Br2

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