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! HClO4(aq) + Cu(OH)2(aq) ! Cu(ClO4)2(aq) + H2O(l) 1. What is the coefficient in front of HClO4(aq)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 2. What is the coefficient in front of H2O(l)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 3. What is the coefficient in front of Cu(ClO4)2(aq)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 4. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Bi(s) + O2(g) ! Bi2O3(s) ! 5. What is the coefficient in front of Bi(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 6. What is the coefficient in front of O2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 7. What is the coefficient in front of Bi2O3(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 8. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) none of these - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Ba(OH)2(aq) + Fe2(SO4)3(aq) ! Fe(OH)3(s) + BaSO4(s) ! 9. What is the coefficient in front of Fe2(SO4)3? A) 1 B) 2 C) 3 D) 4 E) 5 ! 10. What is the coefficient in front of BaSO4(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 11. What is the coefficient in front of Fe(OH)3(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 12. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (NH4)2Cr2O7(s) ! Cr2O3(s) + N2(g) + H2O(l) ! 13. What is the coefficient in front of (NH4)2Cr2O7(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 14. What is the coefficient in front of H2O(l)? A) 1 B) 2 C) 3 D) 4 E) 5 !

15. What is the coefficient in front of N2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 16. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Zn(s) + H3PO4(aq) ! H2(g) + Zn3(PO4)2 (s) ! 17. What is the coefficient in front of Zn(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 18. What is the coefficient in front of H3PO4(aq)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 19. What is the coefficient in front of H2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 20. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - CS2(g) + O2(g) ! CO2(g) + SO2(g) ! 21. What is the coefficient in front of O2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 22. What is the coefficient in front of SO2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 23. What is the coefficient in front of CO2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 24. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) none of these - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - N2H4(l) ! NH3(s) + N2(g) ! 25. What is the coefficient in front of N2H4(l)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 26. What is the coefficient in front of NH3(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 27. What is the coefficient in front of N2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 28. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) none of these !! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Al(s) + Cl2(g) ! AlCl3(s) ! 29. What is the coefficient in front of Al(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 30. What is the coefficient in front of Cl2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 31. What is the coefficient in front of AlCl3(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 32. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization ! K3PO4(aq) + SrCl2(aq) ! Sr3(PO4)2(s) + KCl(aq) ! 33. What is the coefficient in front of K3PO4(aq)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 34. What is the coefficient in front of SrCl2(aq)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 35. What is the coefficient in front of KCl(aq)? A) 3 B) 4 C) 5 D) 6 E) 8 ! 36. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - HBr(aq) + Fe2O3(aq) ! FeBr3(aq) + H2O(l) ! 37. What is the coefficient in front of HBr(aq)? A) 3 B) 4 C) 5 D) 6 E) 8 ! 38. What is the coefficient in front of FeBr3(aq)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 39. What is the coefficient in front of H2O(l)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 40. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) neutralization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - CS2(g) + Cl2(g) ! CCl4(g) + SCl2(g) ! 41. What is the coefficient in front of Cl2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 42. What is the coefficient in front of CCl4(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 43. What is the coefficient in front of SCl2(g)? A) 1 B) 2 C) 3 D) 4 E) 5

! 44. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) none of these - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - N2H4(l) + O2(g) ! H2O(g) + N2(g) ! 45. What is the coefficient in front of N2(g)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 46. What is the coefficient in front of H2O(g) ? A) 1 B) 2 C) 3 D) 4 E) 5 ! 47. What is the coefficient in front of N2H4(l)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 48. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) none of these - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Al(s) + S(s) ! Al2S3(s) ! 49. What is the coefficient in front of Al(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 50. What is the coefficient in front of S(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 51. What is the coefficient in front of Al2S3(s)? A) 1 B) 2 C) 3 D) 4 E) 5 ! 52. What type if reaction is this? A) combination B) decomposition C) single replacement D) double replacement E) none of these - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Cs(s) + I2(s) ! CsI(s) ! 53. What is the coefficient in front of CsI(s) ? A) 1 B) 2 C) 3 D) 4 E) none of these ! 54. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

P(s) + H2(s) ! PH3(g) ! 55. What is the coefficient in front of PH3(g)? A) 1 B) 2 C) 3 D) 4 E) none of these !

56. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

Co2S(s) + S8(s) ! CoS(s) ! 57. What is the coefficient in front of Co2S(s)? A) 8 B) 12 C) 16 D) 15 E) none of these ! 58. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

CaO(s) + CO2(g) ! CaCO3(s) ! 59. What is the coefficient in front of CO2(g)? A) 1 B) 2 C) 3 D) 4 E) none of these 60. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

Au2O3(s) + CO2(g) ! Au2(CO3)3(s) 61. What is the coefficient in front of CO2(g)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 62. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

PCl3(s) + H2O(l) ! H3PO3(aq) + HCl(aq) 63. What is the coefficient in front of H2O(l)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 64. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

C2H6(g) + O2(g) ! CO2(g) + H2O(g) 65. What is the coefficient in front of O2(g)?

A) 6 B) 7 C) 8 D) 10 E) none of these ! 66. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

C3H6O2(l) + O2(g) ! CO2(g) + H2O(g) 67. What is the coefficient in front of CO2(g)? A) 4 B) 6 C) 8 D) 10 E) none of these ! 68. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

C6H12O6(s) + O2(g) ! CO2(g) + H2O(g) 69. What is the coefficient in front of O2(g)? A) 7 B) 9 C) 10 D) 11 E) none of these ! 70. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

C6H6(g) + Cl2(g) ! C6H4Cl2(g) + HCl(g) 71. What is the coefficient in front of HCl(g)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 72. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

Pb(NO3)2(aq) + Na2SO4(aq) ! PbSO4(s) + NaNO3(aq) 73. What is the coefficient in front of NaNO3(aq)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 74. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

Fe2O3(s) + C(s) ! Fe(s) + CO2(g)

75. What is the coefficient in front of C(s)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 76. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

TiCl4(s) + Al(s) ! Ti(s) + AlCl3(s) 77. What is the coefficient in front of Ti(s)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 78. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these --------------------------------------------------------------------------------------------

CaH2(s) + H2O(l) ! Ca(OH)2(aq) + H2(g) ! 79. What is the coefficient in front of H2O(l)? A) 1 B) 2 C) 3 D) 4 E) none of these ! 80. This reaction can be described as a A) synthesis B) decomposition C) single displacement D) double displacement E) none of these -------------------------------------------------------------------------------------------- !

HF(g) + B(s) ! HBF4(s) + H2(g) ! 81. What is the coefficient in front of H2(g)? ! A) 1 B) 2 C) 3 D) 4 E) none of these ! 82. This reaction can be described as a ! A) synthesis B) decomposition C) single displacement D) double displacement E) none of these -------------------------------------------------------------------------------------------- !

Mg(ClO3)2(s) + MnO2(s) ! MgCl2(s) + O2(g) + MnO2(s) ! 83. What is the coefficient in front of O2(g)?

! A) 1 B) 2 C) 3 D) 4 E) none of these ! 84. This reaction can be described as a ! A) synthesis B) decomposition C) single displacement D) double displacement E) none of these -------------------------------------------------------------------------------------------- !

B2O3(s) + C(s) ! B4C3(s) + CO2(g) ! 85. What is the coefficient in front of C(s)? ! A) 3 B) 4 C) 5 D) 6 E) none of these ! 86. This reaction can be described as a ! A) synthesis B) decomposition C) single displacement D) double displacement E) none of these -------------------------------------------------------------------------------------------- 87. Which of the following salts should be soluble in water? (Mark all that apply) A) iron (II) chloride B) potassium sulfate C) barium phosphate D) aluminum oxide E) strontium carbonate ! 88. Which of the following salts should be insoluble in water? (Mark all that apply) A) silver chloride B) lead (II) sulfate C) lithium phosphate D) magnesium sulfate E) ammonium carbonate ! 89. What insoluble salt is formed in the following reaction?

Sr(NO3)2(aq) + Na3PO4(aq) ! ? A) strontium phosphate B) sodium nitrate C) strontium phosphide D) strontium phosphite E) sodium nitrite ! 90. What insoluble salt is formed in the following reaction?

Sr(NO3)2(aq) + Na3PO4(aq) ! ? A) Sr3(PO4)2(s) B) SrPO4(s) C) Sr2PO4(s) D) NaNO3(s) E) Na2NO3(s) AB) Na(NO3)2(s)