1. 7 AgCH3CO2 + PO43– → Ag3PO4 + CH3COO– 8 Mn2+ + OH– → Mn(OH)2
1 Precipitation
1 Pb I1– → PbI2
2 CO32– + Zn2+ → ZnCO3
3 Ag+ + Br– → AgBr
4 Ba CO32– → BaCO3
5 NaOH + Mg2+ → Mg(OH)2 + Na+
6 H2S + Cd2+ → CdS + H+
7 AgCH3CO2 + PO43– → Ag3PO4 + CH3COO–
8 Mn OH– → Mn(OH)2
9 PO43– + Ca2+ → Ca3(PO4)2
10 Ba2+ +OH– +Mg2+ +SO42– →BaSO4 + Mg(OH)2

2. 2 CH3COOH + HCO3– → H2O + CO2 + CH3COO– 3 CO32– + H+ → HCO3–
2 Acid/Base
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 → Cu H2O
8 OH– + NH4Cl → NH3 + H2O + Cl–
9 OH– + H3PO4 → H2O + HPO42–
10 H+ + NO2– → HNO2

3. 1 H+ + MnO4– + Sn2+ → Mn2+ + Sn4+ + H2O 2 H+ + I– + IO3– → I2 + H2O
3 Redox
1 H+ + MnO4– + Sn2+ → Mn Sn H2O
2 H+ + I– + IO3– → I2 + H2O
3 H+ + MnO4– + Cl– → Mn Cl2 + H2O
4 Br2 + I– → I2 + Br–
5 Sn Fe3+ → Sn Fe2+
6 H+ + MnO2 + Br– → Mn Br2 + H2O
7 Cr2O72– + SO32– → Cr SO42–
8 H2O2 + I– → H2O + I2
9 H+ + Fe MnO4– → Fe Mn H2O
10 H+ + Na2Cr2O7 + Br– → Na+ +Br2 + Cr3+ +H2O

4. 1 Zn + Sn2+ → Sn + Zn2+ 2 Sn2+ + Ag+ → Sn4+ + Ag
4 Metal Displacement
1 Zn + Sn2+ → Sn + Zn2+
2 Sn Ag+ → Sn Ag
3 Zn + Cu2+ → Cu + Zn2+
4 Cl2 + Br– → Cl– + Br2
5 Ca + H+ → Ca H2
6 Pb + Ag+ → Pb Ag
7 Na + H2O → Na+ + OH– + H2
8 Fe + Fe3+ → Fe2+
9 Al + Fe2+ → Al Fe
10 MnO4– + SO32– → MnO2 + SO42–

5. 1 AgCH3CO2 + CO32– → Ag2CO3 + CH3COO– 2 NaCN + H2O → HCN + Na+ + OH–
5 Types 1-4
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 NH OH– → NH3 + H2O
9 H+ + SO42– + CaF2 → CaSO4 + HF
10 H2S + Ni2+ → H+ + NiS

6. 14 OH– + CH3CH2COOH→ H2O + CH3CH2COO– 15 BaO + H2O → Ba(OH)2
5 Types 1-4
11 Zn 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

7. 3 MnO4– + H+ + Cl– → Mn2+ + Cl2 + H2O
6 Types 1-4
1 Fe I– → Fe + I2
2 H2S + Ag+ → H+ + Ag2S
3 MnO4– + H+ + Cl– → Mn Cl2 + H2O
4 Sn(CH3CO2)2 + PO43– → Sn3(PO4)2 + Ac–
5 NaF + H2O → HF + Na+ + OH–
6 Cu OH– → Cu(OH)2
7 CO32– + H+ → HCO3–
8 H+ + ZnS → Zn H2S
9 Cr2O72– + SO32– → Cr SO42–
10 OH– + H3PO4 → H2O + HPO42–

8. 14 CH3CO2H +Ba(OH)2→ Ba2+ + CH3CO2– +H2O 15 Ag+ + Fe2+ → Ag + Fe3+
6 Types 1-4
11 Zn + Cu2+ → Zn Cu
12 MnO4– + H2SO3 → SO42– + Mn H2O
13 PH3 + BCl3 → H3PBCl3
14 CH3CO2H +Ba(OH)2→ Ba2+ + CH3CO2– +H2O
15 Ag+ + Fe2+ → Ag + Fe3+

9. 4 Cu(OH)2 + NH3 → Cu(NH3)42+ + OH– 5 OH– + Mg2+ → Mg(OH)2
7 Types 1 – 7
1 C6H5Cl + O2 → CO2 + H2O + HCl
2 CO2 + OH– → CO32– + H2O
3 HNO2 + OH– → H2O + NO2–
4 Cu(OH)2 + NH3 → Cu(NH3) 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

10. 12 SCN– + Fe3+ → Fe(SCN)2+ or Fe(SCN)63–
7 Types 1 – 7
11 Pb 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–

11. 2 H+ + SO42– + Ba2+ + OH– → H2O + BaSO4
8 Types 1 – 10 balanced!
1 Ca H+ → Ca H2
2 H+ + SO42– + Ba2+ + OH– → H2O + BaSO4
3 14H+ +3Sn2+ + Cr2O72–→ 2Cr3+ + 3Sn4+ + 7H2O
4 Br I– → I Br–
5 2 CN– + Ag+ → Ag(CN)2–
6 2 H2O → 2 H2 + O2
7 2 H+ + CaO → Ca H2O
8 NaF + H2O → Na+ + OH– + HF
9 CO2 + Ca OH– → CaCO3 + H2O
10 2 H+ + SO32– → H2SO3

12. 15 Zn(NO3)2 + 4 OH– → Zn(OH)42– + 2 NO3–
8 Types 1 – 10 balanced
11 Ag+ + Br– → AgBr
12 2 KClO3 → 2 KCl O2
13 3 Cl Fe → 2 FeCl3
14 BH3 + NH3 → H3NBH3
15 Zn(NO3) OH– → Zn(OH)42– NO3–

13. 4 NH3 + CH3COOH → CH3COO– + NH4+
9 Types 1 – 10 balanced
1 Ni + Cu2+ → Ni 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–+3SO32–→2MnO2+3SO42–+2 OH–
8 Al OH– → Al(OH)63–
9 Zn CrO42– → ZnCrO4
10 H2O Br– + 2 H+ → 2 H2O + Br2

14. 9 Types 1 – 10 balanced
11 3 Mg + N2 → Mg3N2
12 Ni S2– → NiS
13 2 Cu H2O → 2 Cu + O H+
14 Cl OH– → OCl– + H2O + Cl–
15 Mg3N D2O → 3 MgO ND3

15. 2 2 CH3COOH+CO32–→H2O+ CO2 + 2 CH3COO– 10
1 Ba SO42– → BaSO4
2 2 CH3COOH+CO32–→H2O+ CO2 + 2 CH3COO–
3 Pb(NO3) Cl– → PbCl NO3–
4 16H+ +2MnO4– + 5Sn2+→5Sn4+ + 2Mn2+ + 8H2O
5 Na H2O → Na OH– + H2
6 Cu OH– → Cu(OH)2
7 H+ + CO32– → HCO3–
8 Fe H3PO4 → FePO H+
9 SO2 + H2O2 → 2 H+ + SO42–
10 2 Fe Cu2+ → 2 Fe Cu

16. 12 14H+ + Cr2O72– + 6Br– → 3Br2 + 2Cr3+ + 7H2O 13 F– + H+ → HF 10
11 NaH + H2O → H2 + Na+ + OH–
12 14H+ + Cr2O72– + 6Br– → 3Br2 + 2Cr3+ + 7H2O
13 F– + H+ → HF
14 2 H+ + CaO → Ca H2O
15 Cl Br– → 2 Cl– + Br2

17. 5 CH3COOH + HCO3– →CH3COO– + H2O + CO2 6 CuO + 2 H+ → Cu2+ + H2O 11
1 Ti + O2 → TiO2
2 SO2 + CaO → CaSO3
3 Pb Ag+ → Pb Ag
4 3 Mg + N2 → Mg3N2
5 CH3COOH + HCO3– →CH3COO– + H2O + CO2
6 CuO H+ → Cu H2O
7 2 H2O2 → 2 H2O + O2
8 2 PbS O2 → 2 PbO SO2
9 2 H+ + SO42- + Ca(CN)2 → 2 HCN + CaSO4
10 2 KClO3 → 2 KCl O2

18. 11 2 V3+ + 3 CO32– → V2(CO3)3 12 4 NH3 + Zn2+ → Zn(NH3)42+
13 2 AgNO3 + CrO42– → Ag2CrO NO3–
14 CaC H2O → Ca(OH)2 + C2H2
15 2 Al OH– + 6 H2O → 2 Al(OH)63– + 3 H2

19. 2000 a Ca + 2 H2O → Ca(OH)2 + H2 b C4H9OH + 6 O2 → 4 CO2 + 5 H2O12
2000
a Ca H2O → Ca(OH)2 + H2
b C4H9OH O2 → 4 CO H2O
c 4 NH3 + Ni2+ → Ni(NH3)42+
d Cu S2– → CuS
e Sn Ag+ → Sn Ag
f SrO + H2O → Sr(OH)2
h 3 CO + Fe2O3 → 2 Fe CO2

20. f 2 H+ + Cl– + Ag(NH3)2+ → AgCl + 2 NH4+ g Na2O + H2O → 2 Na+ + 2 OH– 12
1998
a Sn Fe3+ → 2 Fe Sn4+
b Co OH– → Co(OH)2
c C2H O2 → 2 CO H2O
d H3PO4 + OH– → H2O + H2PO4–
e CaSO3 → CaO + SO2
f 2 H+ + Cl– + Ag(NH3)2+ → AgCl NH4+
g Na2O + H2O → 2 Na OH–
h Zn H+ → Zn H2

21. 1997 a 6 OH– + Al3+ → Al(OH)63– b 6 H+ + 5 Br– + BrO3– → 3 Br2 + 3 H2O13
1997
a 6 OH– + Al3+ → Al(OH)63–
b 6 H Br– + BrO3– → 3 Br 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 Ni S2– → NiS

22. e 6H+ + 3SO42– +Ca3(PO4)2→2H3PO4 + 3 CaSO4 f H2S + Hg2+ → HgS + 2 H+ 13
1995
a C2H5OH O2 → 2 CO H2O
b BaO + H2O → Ba OH–
c Cl OH– → H2O + OCl– + Cl–
d 4 H Fe O2 → 4 Fe H2O
e 6H+ + 3SO42– +Ca3(PO4)2→2H3PO4 + 3 CaSO4
f H2S + Hg2+ → HgS H+
g CaH H2O → 2 H2 + Ca OH–
h Zn + Cu2+ → Cu + Zn2+

23. d OH– + CH3CH2COOH → H2O + CH3CH2COO– 14
2001
a SO2 + H2O → H2SO3
b SCN– + Fe3+ → Fe(SCN)2+
c Cu Ag+ → 2 Ag + Cu2+
d OH– + CH3CH2COOH → H2O + CH3CH2COO–
e 14H+ + 6Fe2+ + Cr2O72–→2Cr3+ + 6Fe3+ + 7H2O
f Cl Br– → 2 Cl– + Br2
g Sr SO42– → SrSO4
h MgCO3 → MgO + CO2

24. g 8 H+ + MnO4– + 5 Fe2+ →5 Fe3+ + Mn2+ + 4H2O 14
2002
a 2 I– + Pb2+ → PbI2
b P O2 → P4O10
c Cs2O + H2O → 2 Cs OH–
d 4 Cl– + Co2+ → CoCl42–
e 2 NaHCO3 → Na2CO3 + H2O + CO2
f 2 H+ + ZnS → Zn H2S
g 8 H+ + MnO4– + 5 Fe2+ →5 Fe3+ + Mn2+ + 4H2O
h OH– + NH4Cl → NH3 + H2O + Cl–

25. 2002 Form B a 2 C3H7OH + 9 O2 → 6 CO2 + 8 H2O b CrO42– + Pb2+ → PbCrO415
2002 Form B
a 2 C3H7OH O2 → 6 CO H2O
b CrO42– + Pb2+ → PbCrO4
c Fe Fe3+ → 3 Fe2+
d 4 NH3 + Cu2+ → Cu(NH3)42+
e SO2 + H2O → H2SO3
f PO43– + H+ → HPO4–
g HCl + CN– → HCN + Cl–
h Br I– → 2 Br– + I2

26. d CH3COOH + OH– → CH3COO– + H2O e 2 K + 2 H2O → 2 K+ + 2 OH– + H2 15
2005 Form B
a CO32– + Sr2+ → SrCO3
b 2 C3H O2 → 6 CO H2O
c 4 NH3 + Zn2+ → Zn(NH3)42+
d CH3COOH + OH– → CH3COO– + H2O
e 2 K H2O → 2 K OH– + H2
f Fe + S → FeS
g H+ + F– → HF
h Pb Ag+ → Pb Ag