1 Pb2+ + I1– → PbI2

2 CO32– + Zn2+ → ZnCO3

3 Ag+ + Br– → AgBr

4 Ba2+ + CO32– → BaCO3

5 NaOH + Mg2+ → Mg(OH)2 + Na+

6 H2S + Cd2+ → CdS + H+

7 AgCH3CO2 + PO43– → Ag3PO4 + CH3COO–

8 Mn2+ + OH– → Mn(OH)2

9 PO43– + Ca2+ → Ca3(PO4)2

10 Ba2+ +OH– +Mg2+ +SO42– →BaSO4 + Mg(OH)2

1 Precipitation

1 NaCN + H2O → HCN + Na+ + OH–

2 CH3COOH + HCO3– → H2O + CO2 + CH3COO–

3 CO32– + H+ → HCO3

–

4 CH3COOH + MgCO3 → Mg2+ + Ac– + H2O+CO2

5 Zn(OH)2 + OH– → Zn(OH)42–

6 F– + H+ → HF

7 H+ + Cu(OH)2 → Cu2+ + H2O

8 OH– + NH4Cl → NH3 + H2O + Cl–

9 OH– + H3PO4 → H2O + HPO42–

10 H+ + NO2– → HNO2

2 Acid/Base

1 H+ + MnO4– + Sn2+ → Mn2+ + Sn4+ + H2O

2 H+ + I– + IO3– → I2 + H2O

3 H+ + MnO4– + Cl– → Mn2+ + Cl2 + H2O

4 Br2 + I– → I2 + Br–

5 Sn2+ + Fe3+ → Sn4+ + Fe2+

6 H+ + MnO2 + Br– → Mn2+ + Br2 + H2O

7 Cr2O72– + SO3

2– → Cr3+ + SO42–

8 H2O2 + I– → H2O + I2

9 H+ + Fe2+ + MnO4– → Fe3+ + Mn2+ + H2O

10 H+ + Na2Cr2O7 + Br– → Na+ +Br2 + Cr3+ +H2O

3 Redox

1 Zn + Sn2+ → Sn + Zn2+

2 Sn2+ + Ag+ → Sn4+ + Ag

3 Zn + Cu2+ → Cu + Zn2+

4 Cl2 + Br– → Cl– + Br2

5 Ca + H+ → Ca2+ + H2

6 Pb + Ag+ → Pb4+ + Ag

7 Na + H2O → Na+ + OH– + H2

8 Fe + Fe3+ → Fe2+

9 Al + Fe2+ → Al3+ + Fe

10 MnO4– + SO3

2– → MnO2 + SO42–

4 Metal Displacement

1 AgCH3CO2 + CO32– → Ag2CO3 + CH3COO–

2 NaCN + H2O → HCN + Na+ + OH–

3 Al + Ni2+ → Ni + Al3+

4 OH– + Mg2+ → Mg(OH)2

5 Cs + H2O → Cs+ + OH– + H2

6 H+ + SO42– + Ba2+ + Ac– → BaSO4 + CH3CO2H

7 Zn + Cu2+ → Cu + Zn2+

8 NH4+ + OH– → NH3 + H2O

9 H+ + SO42– + CaF2 → CaSO4 + HF

10 H2S + Ni2+ → H+ + NiS

5 Types 1-4

11 Zn2+ + PO43– → Zn3(PO4)2

12 CaCO3 + H+ → H2O + CO2 + Ca2+

13 I– + Pb2+ → PbI2

14 OH– + CH3CH2COOH→ H2O + CH3CH2COO–

15 BaO + H2O → Ba(OH)2

5 Types 1-4

1 Fe3+ + I– → Fe + I2

2 H2S + Ag+ → H+ + Ag2S

3 MnO4– + H+ + Cl– → Mn2+ + Cl2 + H2O

4 Sn(CH3CO2)2 + PO43– → Sn3(PO4)2 + Ac–

5 NaF + H2O → HF + Na+ + OH–

6 Cu2+ + OH– → Cu(OH)2

7 CO32– + H+ → HCO3

–

8 H+ + ZnS → Zn2+ + H2S

9 Cr2O72– + SO3

2– → Cr3+ + SO42–

10 OH– + H3PO4 → H2O + HPO42–

6 Types 1-4

11 Zn + Cu2+ → Zn2+ + Cu

12 MnO4– + H2SO3 → SO4

2– + Mn2+ + H2O

13 PH3 + BCl3 → H3PBCl3

14 CH3CO2H +Ba(OH)2→ Ba2+ + CH3CO2– +H2O

15 Ag+ + Fe2+ → Ag + Fe3+

6 Types 1-4

1 C6H5Cl + O2 → CO2 + H2O + HCl

2 CO2 + OH– → CO32– + H2O

3 HNO2 + OH– → H2O + NO2–

4 Cu(OH)2 + NH3 → Cu(NH3)42+ + OH–

5 OH– + Mg2+ → Mg(OH)2

6 Ag2S + H+ → Ag+ + H2S

7 SO2 + OH– → SO32– + H2O

8 N2O3 + H2O → HNO2

9 NH3 + Co2+ → Co(NH3)42+

10 C2H5OH + O2 → CO2 + H2O

7 Types 1 – 7

11 Pb2+ + I– → PbI2

12 SCN– + Fe3+ → Fe(SCN)2+ or Fe(SCN)63–

13 Na2SO3 + H2O → Na+ + H2SO3 + OH–

14 AgCl + CN– → Ag(CN)2– + Cl–

15 Li2O + H2O → Li+ + OH–

7 Types 1 – 7

1 Ca + 2 H+ → Ca2+ + H2

2 H+ + SO42– + Ba2+ + OH– → H2O + BaSO4

3 14H+ +3Sn2+ + Cr2O72–→ 2Cr3+ + 3Sn4+ + 7H2O

4 Br2 + 2 I– → I2 + 2 Br–

5 2 CN– + Ag+ → Ag(CN)2–

6 2 H2O → 2 H2 + O2

7 2 H+ + CaO → Ca2+ + H2O

8 NaF + H2O → Na+ + OH– + HF

9 CO2 + Ca2+ + 2 OH– → CaCO3 + H2O

10 2 H+ + SO32– → H2SO3

8 Types 1 – 10balanced!

11 Ag+ + Br– → AgBr

12 2 KClO3 → 2 KCl + 3 O2

13 3 Cl2 + 2 Fe → 2 FeCl3

14 BH3 + NH3 → H3NBH3

15 Zn(NO3)2 + 4 OH– → Zn(OH)42– + 2 NO3

–

8 Types 1 – 10balanced

1 Ni + Cu2+ → Ni2+ + Cu

2 2 Ag+ + CrO42– → Ag2CrO4

3 H2 + CuO → Cu + H2O

4 NH3 + CH3COOH → CH3COO– + NH4+

5 (NH4)2CO3+Ba2++2 OH–→BaCO3+ 2NH3+ 2H2O

6 N2O3 + H2O → 2 HNO2

7 H2O +2MnO4–+3SO3

2–→2MnO2+3SO42–+2 OH–

8 Al3+ + 6 OH– → Al(OH)63–

9 Zn2+ + CrO42– → ZnCrO4

10 H2O2 + 2 Br– + 2 H+ → 2 H2O + Br2

9 Types 1 – 10 balanced

11 3 Mg + N2 → Mg3N2

12 Ni2+ + S2– → NiS

13 2 Cu2+ + 2 H2O → 2 Cu + O2 + 4 H+

14 Cl2 + 2 OH– → OCl– + H2O + Cl–

15 Mg3N2 + 3 D2O → 3 MgO + 2 ND3

9 Types 1 – 10 balanced

1 Ba2+ + SO42– → BaSO4

2 2 CH3COOH+CO32–→H2O+ CO2 + 2 CH3COO–

3 Pb(NO3)2 + 2 Cl– → PbCl2 + 2 NO3–

4 16H+ +2MnO4– + 5Sn2+→5Sn4+ + 2Mn2+ + 8H2O

5 Na + 2 H2O → Na+ + 2 OH– + H2

6 Cu2+ + 2 OH– → Cu(OH)2

7 H+ + CO32– → HCO3

–

8 Fe3+ + H3PO4 → FePO4 + 3 H+

9 SO2 + H2O2 → 2 H+ + SO42–

10 2 Fe + 3 Cu2+ → 2 Fe3+ + 3 Cu

10

11 NaH + H2O → H2 + Na+ + OH–

12 14H+ + Cr2O72– + 6Br– → 3Br2 + 2Cr3+ + 7H2O

13 F– + H+ → HF

14 2 H+ + CaO → Ca2+ + H2O

15 Cl2 + 2 Br– → 2 Cl– + Br2

10

1 Ti + O2 → TiO2

2 SO2 + CaO → CaSO3 3 Pb + 4 Ag+ → Pb4+ + 4 Ag

4 3 Mg + N2 → Mg3N2

5 CH3COOH + HCO3– →CH3COO– + H2O + CO2

6 CuO + 2 H+ → Cu2+ + H2O

7 2 H2O2 → 2 H2O + O2

8 2 PbS + 3 O2 → 2 PbO + 2 SO2

9 2 H+ + SO42- + Ca(CN)2 → 2 HCN + CaSO4

10 2 KClO3 → 2 KCl + 3 O2

11

11 2 V3+ + 3 CO32– → V2(CO3)3

12 4 NH3 + Zn2+ → Zn(NH3)42+

13 2 AgNO3 + CrO42– → Ag2CrO4 + 2 NO3

–

14 CaC2 + 2 H2O → Ca(OH)2 + C2H2

15 2 Al + 6 OH– + 6 H2O → 2 Al(OH)63– + 3 H2

11

2000

a Ca + 2 H2O → Ca(OH)2 + H2

b C4H9OH + 6 O2 → 4 CO2 + 5 H2O

c 4 NH3 + Ni2+ → Ni(NH3)42+

d Cu2+ + S2– → CuSe Sn2+ + 2 Ag+ → Sn4+ + 2 Ag

f SrO + H2O → Sr(OH)2

h 3 CO + Fe2O3 → 2 Fe + 3 CO2

12

1998a Sn2+ + 2 Fe3+ → 2 Fe2+ + Sn4+

b Co2+ + 2 OH– → Co(OH)2

c C2H4 + 3 O2 → 2 CO2 + 2 H2O

d H3PO4 + OH– → H2O + H2PO4–

e CaSO3 → CaO + SO2

f 2 H+ + Cl– + Ag(NH3)2+ → AgCl + 2 NH4

+

g Na2O + H2O → 2 Na+ + 2 OH–

h Zn + 2 H+ → Zn2+ + H2

12

1997

a 6 OH– + Al3+ → Al(OH)63–

b 6 H+ + 5 Br– + BrO3– → 3 Br2 + 3 H2O

c SO2 + H2O → H2SO3

d PH3 + BCl3 → H3P-BCl3

e H2 + FeO → Fe + H2O

f KNH2 + H2O → NH3 + K+ + OH–

g 3 Mg + N2 → Mg3N2 h Ni2+ + S2– → NiS

13

1995

a C2H5OH + 3 O2 → 2 CO2 + 3 H2O

b BaO + H2O → Ba2+ + 2 OH–

c Cl2 + 2 OH– → H2O + OCl– + Cl–

d 4 H+ + 4 Fe2+ + O2 → 4 Fe3+ + 2 H2O

e 6H+ + 3SO42– +Ca3(PO4)2→2H3PO4 + 3 CaSO4

f H2S + Hg2+ → HgS + 2 H+

g CaH2 + 2 H2O → 2 H2 + Ca2+ + 2 OH– h Zn + Cu2+ → Cu + Zn2+

13

2001

a SO2 + H2O → H2SO3 b SCN– + Fe3+ → Fe(SCN)2+ c Cu + 2 Ag+ → 2 Ag + Cu2+

d OH– + CH3CH2COOH → H2O + CH3CH2COO–

e 14H+ + 6Fe2+ + Cr2O72–→2Cr3+ + 6Fe3+ + 7H2O

f Cl2 + 2 Br– → 2 Cl– + Br2

g Sr2+ + SO42– → SrSO4

h MgCO3 → MgO + CO2

14

2002

a 2 I– + Pb2+ → PbI2

b P4 + 5 O2 → P4O10

c Cs2O + H2O → 2 Cs+ + 2 OH–

d 4 Cl– + Co2+ → CoCl42–

e 2 NaHCO3 → Na2CO3 + H2O + CO2

f 2 H+ + ZnS → Zn2+ + H2S

g 8 H+ + MnO4– + 5 Fe2+ →5 Fe3+ + Mn2+ + 4H2O

h OH– + NH4Cl → NH3 + H2O + Cl–

14

2002 Form B

a 2 C3H7OH + 9 O2 → 6 CO2 + 8 H2O

b CrO42– + Pb2+ → PbCrO4

c Fe + 2 Fe3+ → 3 Fe2+

d 4 NH3 + Cu2+ → Cu(NH3)42+

e SO2 + H2O → H2SO3

f PO43– + H+ → HPO4

– g HCl + CN– → HCN + Cl–

h Br2 + 2 I– → 2 Br– + I2

15

2005 Form B

a CO32– + Sr2+ → SrCO3

b 2 C3H6 + 9 O2 → 6 CO2 + 6 H2O

c 4 NH3 + Zn2+ → Zn(NH3)42+

d CH3COOH + OH– → CH3COO– + H2O

e 2 K + 2 H2O → 2 K+ + 2 OH– + H2

f Fe + S → FeSg H+ + F– → HFh Pb + 4 Ag+ → Pb4+ + 4 Ag

15