CHEM 1001/CHM 1020/ Chm1025C/CHM1032C Name:___Answers_______
Module Five Sample Pretest
Module
Five-Part F Balancing Chemical Equations 20 points
Balance the
following chemical equations (write the chemical formulas in #10 then balance):
1. Fe
+ 2
FeCl3 -----> 3 FeCl2
2. 4
Al + 3 O2 -----> 2 Al2O3
3. Na2CO3 + 4 C + N2 -----> 2 NaCN + 3 CO
4. 4
FeS +
7 O2 -----> 2 Fe2O3 +
4
SO2
5. 3 IBr
+ 4 NH3 -----> NI3 +
3
NH4Br
6. Cl2 +
HOH -----> HCl +
HClO
7. 2 AgNO3 -----> 2 AgNO2 +
O2
8. 12 HClO4 +
P4O10 -----> 4 H3PO4 +
6
Cl2O7
9. 2 HCl + Mg(OH)2 -----> MgCl2 +
2
HOH
10.
Sodium hydroxide + Hydrochloric acid ----->
sodium chloride + water
NaOH + HCl ----->
NaCl + HOH