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On adding a drop of barium chloride solu...

On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, white precipitate is obtained :
(a) Write a balanced chemical equation for the reaction involved.
(b) What other name can be given to this precipitation reaction
(c) On adding dilute hydrochloric acid to the reaction mixture, white precipitate disappears. Why ?

Text Solution

Verified by Experts

`(a) underset(underset("sulphite")("Sodium"))(Na_(2)SO_(3)(aq))+underset(underset("chloride")("Barium"))(BaCl_(2)(aq)) to underset(underset("sulphite")("Barium"))(BaSO_(3))+underset(underset("chloride")("Sodium"))(2NaCl(aq))`
(b) Double displacement reaction
`(c) underset("(White ppt.)")(BaSO_(3))(s)+underset(underset(underset("(dilute)")("acid"))("Hydrochloric"))(2HCl(aq)) to underset(underset(underset("(soluble)")("chloride"))("Barium"))(BaCl_(2)(aq))+underset("Water")(H_(2)O(l))+underset(underset("dioxide")("Sulphur"))(So_(2)(g))`
As the reaction product barium chloride is water soluble, the white precipitate disappears.
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