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

AcademicChemistryNCERTClass 10

(a) On adding a drop of Barium Chloride solution to an aqueous solution of sodium sulphite, barium sulphite is obtained which is a white colour precipitate.
$BaCl_2 + Na_2SO_3 \rightarrow BaSO_3 + 2NaCl$

(b) In this case, the precipitation reaction is also a double displacement reaction.

(c) On adding dilute HCl to the above reaction mixture, Barium chloride, Sulphur dioxide and water are formed. Barium chloride is a soluble substance which will make the white precipitate disappear.
$BaSO_3 + HCl\rightarrow BaCl_3 + SO_2 + H_2O$.
raja
Updated on 10-Oct-2022 13:27:10

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