Balancing Single Replacement
Balancing Double Replacement
Balancing Synthesis & Decomposition
Balancing Combustion
Name that Type
100

___ H2S + ___ O2 --> ___ H2O + ___ S

2 H2S +  O2 --> 2 H2O + 2 S

2 / 1 / 2 / 2 

100

___ KI + ___ Pb(NO3)2 --> ___ KNO3 + ___ PbI2

2 KI + Pb(NO3)2 --> 2KNO3 +  PbI2 

2 / 1 / 2 / 1

100

___ Li (s) + ___ Cl2 (g) --> ___ LiCl (s)

2 Li (s) +  Cl2 (g) --> 2 LiCl (s)

2 / 1 / 2 

100

___CH4+ ___ O2 --> ___ CO2 + ___ H2O

CH4+2 O2 -->  CO2 +  H2O
1 / 2 / 1 / 1 

100

2 H2O --> 2 H2 + O2

Decomposition 

200

___ NiS + ___ O2 --> ___ NiO + ___ SO2

2 NiS + 3 O2 --> 2 NiO + 2 SO2
2 / 3 / 2 / 2 

200

___Ba(NO3)2 + ___ Na2SO4 --> ___ BaSO4 + ___ NaNO3

 Ba(NO3)2 +  Na2SO4 -->   BaSO4 + 2 NaNO3 

1 / 1 / 1 / 2 

200

___ KClO3 --> ____ KCl + ___ O2

2 KClO3 --> 2 KCl + 3 O2
2 / 2 / 3 

200

___ C3H8 + ___ O2 --> ___ CO2 + ___ H2O

 C3H8 + 5O2 --> 3CO2 +4H2O
1 / 5 / 3 / 4 

200

Zn (s) + I2 (s) --> ZnI2

Synthesis 

300

___ Al + ___ HCl --> ___AlCl3 + ___ H2

2 Al + 6 HCl --> 2 AlCl3 + 3 H2
2 / 6 / 2 / 3 

300

___ Fe2O3 + ___ HNO3 --> ___ Fe(NO3)3 + ___ H2O

Fe2O3 + 6 HNO3 --> 2 Fe(NO3)3 +3 H2O
1 / 6 / 2 / 3 

300

___ Fe + ___ O2 --> ___ Fe2O3

4 Fe + 3 O2 --> 2 Fe2O3
4 / 3 / 2

300

___ C6H14 + ___ O2 --> ___ CO2 + ____ H2O

2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
2 / 19 / 12 / 14 

300

___BaO2 --> ___BaO + ___ O2

Decomposition
2 / 1 / 2

400

Copper + Silver (I) nitrate --> Silver + Copper (II) nitrate

Cu + 2 AgNO3 --> 2 Ag + Cu(NO3)2

400

Ammonium dichromate + Lead (II) chloride --> Lead (II) dichromate + Ammonium chloride

(NH4)2Cr2O7 + PbCl2 --> PbCr2O7 + 2 NH4Cl

400

Sodium bicarbonate decomposes into sodium carbonate, carbon dioxide, and water.

2 NaHCO3 --> Na2CO3 + CO2 + H2O

400

Propanol (C3H7OH) reacts with oxygen to form carbon dioxide and water.

2C3H7OH + 9 O2 --> 6 CO2 + 8 H2O

400

___ C2H5OH (l) + ___ O2 (g) --> ___ CO2 (g) + ___ H2O (l)

Combustion
1 / 3 / 2 / 3 

500

___ MoS2 (s) + ___ O2 (g) --> ___ MoO3 (l) + ___ SO2 (g)

2 / 7 / 2 / 4 

500

Zinc (II) Phosphate + aluminum sulfate --> zinc (II) sulfate + aluminum phosphate

Zn3(PO4)2 + Al2(SO4)3 --> 3 ZnSO4 + 2 AlPO4

500

Sodium Iodide is used as a catalyst to decompose hydrogen peroxide into water and oxygen

2 H2O2 --> 2 H2O + O2
NaI must be put over the arrow 

500

Decane (C10H22) reacts with oxygen to form carbon dioxide and water.

2 C10H22 + 31 O2 --> 20 CO2 + 22 H2O

500

Sodium metal reacts with water to yields aqueous sodium hydroxide and hydrogen gas

Single Replacement 

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