How will the action of dilute hydrochloric acid enable you to distinguish between the following :
(a) Sodium carbonate and sodium sulphite
(b) Sodium thiosulphate and sodium sulphite.

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Solution

a. Sodium carbonate on treating with dil. HCl results in the formation of sodium chloride with the liberation of carbon dioxide gas. ↑

Sodium sulphite on treating with dil. HCl results in the formation of sodium chloride with the liberation of sulphur dioxide gas. ↑

b. Sodium thiosulphate reacts with dil. HCl to produce sulphur dioxide gas and precipitates yellow sulphur.
+ S ↓

Sulphur is not precipitated when sulphites are treated with dil. HCl.

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How will the action of dilute hydrochloric acid enable you to distinguish between the following : (a) Sodium carbonate and sodium sulphite (b) Sodium thiosulphate and sodium sulphite.

How will the action of dilute hydrochloric acid enable you to distinguish between the following :
(a) Sodium carbonate and sodium sulphite
(b) Sodium thiosulphate and sodium sulphite.