19. What do you observe when aqueous solution
of Na2SO4 reacts with aqueous solution
of BaCl2? Name the type of chemical reaction.
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We will observe that a white substance which is insoluble in water is formed. This insoluble substance is known as a precipitate. The white precipitate is due the the formation of insoluble barium sulphate. The reaction takes place is --
Na2SO4 (aq.) + BaCl2 (aq.) ----> NaCl (aq.) + BaSO4 (s)
The type of reaction took place is Double Displacement reaction, as precipitate is formed as well so it is also called precipitation reaction.
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