balancing equations

1. Combustion of ethane (C₂H₆):

balance equation:

C2​H6​+O2​→CO2​+H2​O

2C2​H6​+7O2​→4CO2​+6H2​O

Reaction of aluminum with iron(III) oxide (thermite reaction):

balance equation:

Al+Fe2​O3​→Al2​O3​+Fe

2Al+Fe2​O3​→Al2​O3​+2Fe

Decomposition of potassium chlorate:

​ Balanced Equation:

KClO3​→KCl+O2

2KClO3​→2KCl+3O2

Reaction of sulfur dioxide with oxygen (Contact process):

Balanced Equation:

SO2​+O2​→SO3

2SO2​+O2​→2SO3

Combustion of propane (C₃H₈):

Balanced Equation:

C3​H8​+O2​→CO2​+H2​O

C3​H8​+5O2​→3CO2​+4H2​O

Reaction of zinc with hydrochloric acid:

Balanced Equation:

Zn+HCl→ZnCl2​+H2

Zn+2HCl→ZnCl2​+H2

Reaction of calcium carbonate with hydrochloric acid:

Balanced Equation:

CaCO3​+HCl→CaCl2​+CO2​+H2​O

CaCO3​+2HCl→CaCl2​+CO2​+H2​O

Formation of ammonia in the Haber process:

Balanced Equation:

N2​+H2​→NH3

N2​+3H2​→2NH3

Decomposition of hydrogen peroxide:

​ Balanced Equation:

H2​O2​→H2​O+O2

2H2​O2​→2H2​O+O2

Combustion of butane (C₄H₁₀):

Balanced Equation:

C4​H10​+O2​→CO2​+H2​O

2C4​H10​+13O2​→8CO2​+10H2​O

Reaction of iron with chlorine:

Balanced Equation:

Fe+Cl2​→FeCl3

2Fe+3Cl2​→2FeCl3​

Reaction of sodium hydroxide with sulfuric acid:

Balanced Equation:

NaOH+H2​SO4​→Na2​SO4​+H2​O

2NaOH+H2​SO4​→Na2​SO4​+2H2​O

Reaction of phosphorus with oxygen:

​ Balanced Equation:

P+O2​→P4​O10

4P+5O2​→P4​O10

Reaction of calcium with water:

​ Balanced Equation:

Ca+H2​O→Ca(OH)2​+H2

Ca+2H2​O→Ca(OH)2​+H2​

Combustion of ethanol (C₂H₅OH):

Balanced Equation:

C2​H5​OH+O2​→CO2​+H2​O

C2​H5​OH+3O2​→2CO2​+3H2​O

Reaction of magnesium with nitrogen:

Balanced Equation:

Mg+N2​→Mg3​N2

3Mg+N2​→Mg3​N2

Reaction of copper(II) sulfate with sodium hydroxide:

Balanced Equation:

CuSO4​+NaOH→Cu(OH)2​+Na2​SO4

CuSO4​+2NaOH→Cu(OH)2​+Na2​SO4

What does the single arrow denotes in a chemical reaction ?

 an irreversible reaction. The reactant becomes products and the products cannot become reactant.

What does the double arrow denotes in a chemical reaction ?

a reversible reaction. The reactant, becomes products and the products can become reactants again using the same process.