Answer:
On mixing the clear
solutions of two ionic compounds, a substance which is insoluble in water, is
formed. This insoluble substance formed is known as precipitate. Any reaction
that produces a precipitate can be called a precipitation reaction.
When sodium sulphate solution is mixed with barium chloride
solution, a white substance BaS04 is formed.
The white precipitate of BaS04 is formed by the reaction of
Ba2+ the other
product formed is sodium chloride which remains in the solution.
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