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MATERIALS REQUIRED:

1. Barium chloride salt

2. Zinc sulphate salt

3. Beakers – 2

4. Glass rods

5. Water

PROCEDURE:

Take a little salt of Zinc sulphate or [Sodium sulphate] and Barium chloride in two separate beakers. Add water and prepare the solutions of the two salts.

Add Barium chloride solution to Zinc sulphate solution. Both the salts exchange their radicals. A White precipitate of Barium sulphate is formed. This reaction is also known as double decomposition reaction. Allow it to settle for some time. The white precipitate settles at the bottom.

EQUATIONS:

  1. BaCl2 + ZnSO4 →  ZnCl+ BaSO4 ↓         
                                             
                                             [white precipitate]
  2. BaCl2 + Na2SO4 →  2NaCl  + BaSO4 ↓         
                                              [white precipitate]

OBSERVATION:

A white precipitate of Barium sulphate is formed. This reaction is called a double displacement reaction.

INFERENCE:

Zinc sulphate and barium chloride exchange their radicals and form two new compounds Zinc chloride and barium sulphate.

QUIZ TIME:

1.Name the products formed when Barium chloride solution is added to Zinc sulphate solution.

Ans : Zinc chloride and barium sulphate

2.What is the observation when Barium chloride solution is added to Zinc sulphate solution.

Ans : A white precipitate is formed.


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