When sodium sulphate solution is added to barium chloride, a white precipitate is formed. Write the chemical name of precipitate obtained and type of chemical reaction involved in this process.

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Solution

Double displacement reactions generally take place in aqueous solutions in which the ions precipitate and there is an exchange of ions. On mixing a solution of barium chloride with sodium sulphate, a white precipitate of barium sulphate is immediately formed. These reactions are ionic in nature.
When sodium sulphate solution is added to barium chloride, a white precipitate is formed and this white precipitate is known as barium sulfate which settles down in form of insoluble precipitate.
Reaction involved =
$N a_{2} S O_{4} + B a C l_{2} ⟶ 2 N a C l + B a S O_{4}$
$(s o d i u m s u l f a t e) (b a r i u m c h l o r i d e) (s o d i u m c h l o r i d e) (b a r i u m s u l f a t e)$

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