Question

27) The mixing of aqueous solution of Na,so, and BaCl, results inthe formation of
1) whole precipitate of NaCl and is a combination reaction
2) yellow precipitate of NaCl and is a double displacement
3) yellow precipitate of Baso, and is combination reaction
4) White precipitate of Baso, and is a double displacement reaction​

Answer 1

Answer:

Aqueous solution of Sodium sulphate when mixed with Barium chloride ,we get a salt named Sodium chloride with Barium sulphate.

This chemical reaction is termed as Double-Displacement reaction , because……

Ax +By ——— Bx + Ay.

Now, in this reaction,

Na2(SO4) + Ba Cl2 ——— 2NaCl +BaSO4

where,

Na - Sodium -Z=11, A=23 ,Capable of One valence electron.

SO4 - Sulphate - excess of 2 electrons.

Ba - Barium -Z=56, A=137 ,Capable of Two valence electrons.

Cl - Chloride - needs one electron to attain stability.