Chemical Equation Worksheet #2
10-12-215
Balance the following equations as indicated.
1. __ AlF3 + __ Mg3N2  __ AlN + __ MgF2
.
2. __ C4H8 + __ O2  __ CO2 + __ H2O
3. __ Pb3(PO4)4+ __ Cr2S3  __ PbS2+ __ CrPO4
4. __ Fe2(SO4)3 + __ HCl  __ FeCl3+ __ H2O + __ SO3
5. __ C12H24 + __ O2  __ CO2 + __ H2O
6. __ Al + __O2  __ Al2O3
7. __ C9H16 + __ O2  __ CO2 + __ H2O
8. __ Cr(SO3)2 + __ H2  __ SO2 + __ Cr + __ H2O
9. __ C4H8 + __ O2  __ CO2 + __ H2O
10. __ Al2(Cr2O7)3 + __ H2  __ CrO2 + __ Al + __ H2O
11. __ Al2(SO4)3 + __ NaCl  __ AlCl3 +__ Na2SO4
.
12. __ C9H20 + __ O2  __ CO2 + __ H2O
13. __ Fe(CO3)2 + __ H2  __ CO2 + __ Fe + __ H2O
For the following questions read pages 224-228
1. What does it mean when “atoms are conserved in a chemical reaction.”
2. Can the formulas of a compound be changed to balance a chemical reaction? Explain
3. Is the following equation balanced? Explain
C5H12 + 5O2  5CO2 + 5H2O
4. When Ethanol burns, it reacts with oxygen according to the equation shown below:
2C2H5OH + _O2  4CO2 + _H2O
a) Balance the equation above by finding the correct coefficients for oxygen and
water.
b. Give the complete chemical name of CO2.
c. Expalin in terms of atoms, why the total mass of the products of a chemical
reaction is equal to the mass of the reactants.