Balancing reactions
Na3PO4 + KOH --> NaOH + K3PO4
1 Na3PO4 + 3 KOH --> 3 NaOH + 1 K3PO4
NaOH
One sodium
One Hydroxide
NaOH+HClO4-->
Double
NaClO4+H2O
Salts of Alkali Metals
Soluble
Exceptions: Some Lithium Compounds
2Mg+O2-->2MgO
Combination
MgF2 + Li2CO3 --> MgCO3 + LiF
1 MgF2 + 1 Li2CO3 --> 1 MgCO3 + 2 LiF
3 Al2O3
Six Aluminum
9 oxygen
AlN-->
Decomposition
2AlN-->2Al3+N
Nitrate salts and Chlorate salts
Soluble
Exceptions:Few
2HgO-->2Hg+O2
Decomposition
P4 + O2 --> P2O3
1 P4 + 3 O2 --> 2 P2O3
NH4Cl
One ammonium
One Chlorine
CaCl2+K2CO3
Double
CaCO3+2KCl
Sulfate Salts
Soluble
Exceptions: Compounds of Pb, Ag, Hg, Ba, Sr, and Ca
2K+H2O-->2KOH+H2
Single replacement
RbNO3 + BeF2 --> Be(NO3)2 + RbF
2 RbNO3 + 1 BeF2 --> 1 Be(NO3)2 + 2 RbF
5 ZnSO4
Five Zinc
One Sulfate
H2SO4+2KOH
Double
H2SO4+2KOH-->2H2O+K2SO4
Chloride Salts
Soluble
Exceptions: Compounds of Ag and some compounds of Hg and Pb
Na2S+Cd(NO3)2-->CdS+2NaNO3
Double Replacement
AgNO3 + Cu --> Cu(NO3)2 + Ag
2 AgNO3 + 1 Cu --> 1 Cu(NO3)2 + 2 Ag
Li2SO4
Two Lithium
One Sulfate
Al+O2
Synthesis
4Al+3O2-->2Al2O3
Carbonates, Phosphates, Chromates, Sulfides, and Hydroxides
Insoluble
Exceptions: Compounds of alkali metals and of ammonia
C2H6+3O2-->2CO2+3H2O
Combustion