What do you mean by precipitation reactions? Explain giving examPles

Monjur Alahi

What do you mean by precipitation reactions? Explain giving examples


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Salim Ahmed Kawsar

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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 is called a precipitation reaction.
When sodium sulphate solution is mixed with barium chloride solution, a white substance BaSO4 is formed.
Na2SO4(aq) + BaCl2(aq) --------> BaSO4(s)↓ +2NaCl(aq) 

The white precipitate of BaSO4 is formed by the reaction of SO4-2and Ba2+. The other product formed is sodium chloride which remains in the solution.

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