Balancing Equations
Worksheet
Balance the Symbol Equations
HCl + Mg(OH)2
→
MgCl2 + H2O
Answer
2HCl + Mg(OH)2
→
MgCl2 + 2H2O
Na + HCl
→
NaCl + H2
Answer
2Na + 2HCl
→
2NaCl + H2
C3H8 + O2
→
H2O + CO2
Answer
C3H8 + 5O2
→
4H2O + 3CO2
Na2CO3 + HNO3
→
NaNO3 + CO2 + H2O
Answer
Na2CO3 + 2HNO3
→
2NaNO3 + CO2 + H2O
K2SO4 + Ba(NO3)2
→
KNO3 + BaSO4
Answer
K2SO4 + Ba(NO3)2
→
2KNO3 + BaSO4
NH3 + H2SO4
→
(NH4)2SO4
Answer
2NH3 + H2SO4
→
(NH4)2SO4
CO2 + H2O
→
C6H12O6 + O2
Answer
6CO2 + 6H2O
→
C6H12O6 + 6O2
C2H6 + Cl2
→
C2H4Cl2 + HCl
Answer
C2H6 + 2Cl2
→
C2H4Cl2 + 2HCl
C2H5OH
→
C2H4 + H2O
Answer
C2H5OH
→
C2H4 + H2O
(Already Balanced)
H2SO4 + HNO3
→
NO2+ + HSO4– + H3O+
Answer
2H2SO4 + HNO3
→
NO2+ + 2HSO4– + H3O+
Write and Balance the Symbol Equations
Sodium + Sulfuric Acid
→
Sodium Sulfate + Hydrogen
Answer
2Na + H2SO4
→
Na2SO4 + H2
Aluminium Oxide + Nitric Acid
→
Aluminium Nitrate + Water
Answer
Al2O3 + 6HNO3
→
2Al(NO3)3 + 3H2O
Hydrogen Peroxide
→
Water + Oxygen
Answer
2H2O2
→
2H2O + O2
Butane + Oxygen
→
Carbon Monoxide + Water
Answer
2C4H10 + 9O2
→
8CO + 10H2O
(Or: C4H10 + 4.5O2 → 4CO + 5H2O)
Lead (II) Nitrate + Sodium Bromide
→
Lead (II) Bromide + Sodium Nitrate
Answer
Pb(NO3)2 + 2NaBr
→
PbBr2 + 2NaNO3
Aluminium + Copper Chloride
→
Aluminium Chloride + Copper
Answer
2Al + 3CuCl2
→
2AlCl3 + 3Cu
Sulfur Dioxide + Oxygen
→
Sulfur Trioxide
Answer
2SO2 + O2
→
2SO3
Calcium + Fluorine
→
Calcium Fluoride
Answer
Ca + F2
→
CaF2
Carbon Monoxide + Nitrogen Monoxide
→
Nitrogen + Carbon Dioxide
Answer
2CO + 2NO
→
N2 + 2CO2
Sulfur + Fluorine
→
Sulfur Hexafluoride
Answer
S + 3F2
→
SF6
From Descriptions
The complete combustion of pentane
Answer
C5H12 + 8 O2 → 5CO2 + 6H2O
The displacement of copper chloride by lead
Answer
CuCl2 + Pb → PbCl2 + Cu
The neutralisation reaction of phosphoric acid and calcium carbonate
Answer
2H3PO4 + 3CaCO3 → Ca3(PO4)2 + 3CO2 + 3H2O
The reaction between iron and sulfuric acid
Answer
Fe + H2SO4 → FeSO4 + H2
The incomplete combustion of butene to form carbon monoxide
Answer
C4H8 + 4O2 → 4CO + 4H2O
The precipitation reaction between sodium hydroxide and copper sulfate
Answer
2NaOH + CuSO4 → Cu(OH)2 + Na2SO4
The decomposition of ammonium chloride
Answer
NH4Cl → NH3 + HCl
The disproportionation of copper (I) sulfate
Answer
Cu2SO4 → Cu + CuSO4
The condensation reaction between ethanol and ethanoic acid
Answer
C2H5OH + CH3COOH → CH3COOC2H5 + H2O
The acid-base reaction of phosphoric acid and ethanoic acid
Answer
H3PO4 + CH3COOH → H2PO4– + CH3COOH2+