Chemical Reactions Review - Balancing, Classifying and Writing Equations
Name: _________________________________________ Date: ___________________ Period: _______
1. In a combustion reaction, one of the reactants is always
________________________________
2. In a combustion reaction, one of the products is always
________________________________
3. In every balanced chemical equation, each side of the equation
has the same number of _________________ of each element.
Step 1 - Balance the following equations.
Step 2 - Fill in the blanks with the type of reaction.
_________________________________
4.
Fe(s) +
Cl2(g) 
FeCl3(s)
5.
Mg(s) +
N2(g) 
Mg3N2(s)
6.
Al(s) +
O2(g) 
Al2O3(s)
7.
K (s) +
Cl2(g) 
KCl(s)
_________________________________
8.
CaCO3(s) 
9.
H2O(l) 
CaO(s) +
O2(g) +
10.
NaCl(l) 
11.
KClO3(s) 
CO2(g)
H2(g)
Na(s) +
KCl (s) +
Cl2(g)
O2(g)
_________________________________
12.
FeCl2(aq) +
13.
HCl(aq) +
14.
AgNO3(aq) +
15.
LiCN(aq) +
Na3PO4(s) 
Ca(OH)2(s) 
AlCl3(aq) 
BaCl2(aq) 
Fe3(PO4)2(s) +
CaCl2(aq) +
NaCl(aq)
H2O(l)
AgCl(s) +
Al(NO3)3(aq)
LiCl(aq) +
Ba(CN)2(s)
_________________________________
16.
Na(s) +
H2O(l) 
17.
Fe(s) +
CuSO4(aq) 
18.
NaBr(aq) +
19.
Sb2S3(s) +
NaOH(aq) +
Cl2(aq) 
Fe(s) 
H2(g)
FeSO4(aq) +
Cu(s)
NaCl(aq) +
Br2(l)
Sb(s) +
FeS(s)
_________________________________
20.
CH4(g) +
O2(g) 
CO2(g) +
H2O(g)
21.
C2H6(g) +
O2(g) 
CO2(g) +
H2O(g)
22.
C2H2(g) +
O2(g) 
23.
C2H5OH(g) +
O2(g)
CO2(g) +

CO2(g)
H2O(g)
+
H2O(g)
For 24 - 28: Write the equation, balance the equation and classify it.
F2
Cl2
Br2
I2
H2
N2
O2
24.) The combustion of propane (C3H8). This is a reaction of propane with oxygen that
yields carbon dioxide and water.
25.) The reaction of aluminum bromide with magnesium hydroxide to form aluminum
hydroxide and magnesium bromide.
26.) Potassium metal and chlorine gas combine to form potassium chloride.
27.) Hydrogen gas and nitrogen monoxide react to form water and nitrogen gas.
28.) The decomposition of hydrogen peroxide (H2O2) to form water and oxygen.