Write the balanced equation for the following chemical reactions.

(ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride

 

Answer

(ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride

The skeletal chemical equation of the above reaction is

 

BaCl 2 + Al 2 (SO 4 ) 3   →  BaSO 4 + AlCl 3

 

Element Name

No of Atoms in Reactant

No of Atoms in Product

Barium

1

1

Chlorine

2

3

Aluminium

2

1

Sulphur

3

1

Oxygen

12

4

 

  1. Number of atoms of Oxygen in reactants number of atoms of Oxygen in products
    To balance number of Oxygen,
    We multiply the BaSO 4 in product by 3 (Oxygen is present in BaSO4)
    The chemical equation becomes

    BaCl 2 + Al 2 (SO 4 ) 3   →  3 BaSO 4 + AlCl 3
    Now, 

 

Element name

No. of atoms in reactants

No. of atoms in products

Barium

1

3

Chlorine

2

3

Aluminium

2

1

Sulphur

3

3

Oxygen

12

12

 

  1. Now,
    Number of atoms of Sulphur in reactants = number of atoms of Sulphur in products
    Number of atoms of Oxygen in reactants = number of atoms of Oxygen in products
    But, Number of other atoms in reactants number of other atoms in products

    To balance, number of Aluminium,
    We multiply AlCl 3 in product by 2 (as it contains Al)
    The chemical equation becomes

 

BaCl 2 + Al 2 (SO 4 ) 3   →  3 BaSO 4 + 2 AlCl 3

 

Now,

 

Element name

No. of atoms in reactants

No. of atoms in product

Barium

1

3

Chlorine

2

6

Aluminium

2

2

Sulphur

3

3

Oxygen

12

12

 

  1. Now,
    Number of atoms of Barium in reactants number of atoms of Barium in products
    Number of atoms of Chlorine in reactants number of atoms of Chlorine in products
    To balance,
    We multiply BaCl 2 in reactant by 3
    The chemical equation becomes
    3 BaCl 2 + Al 2 (SO 4 ) 3   →  3 BaSO 4 + 2 AlCl 3



Name of the element

No. of atoms in Reactant

No. of atoms in Product

Barium

3

3

Chlorine

6

6

Aluminium

2

2

Sulphur

3

3

Oxygen

12

12

 

Now, all the elements are balanced and the balanced equation is

3 BaCl 2 + Al 2 (SO 4 ) 3   →  3 BaSO 4 + 2 AlCl 3

 

3 BaCl 2 + Al 2 (SO 4 ) 3   →  3 BaSO 4 + 2 AlCl 3

  1. Class 10
  2. Chapter 1 Class 10 - Chemical Reactions and Equations (Term 1)

About the Author

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo