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Hydrochloric Acid

Identify the ...

Question

Identify the gas evolved in the following reactions when: Potassium suphite is treated with dilute hydrochloric acid.

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Solution

Reaction of metallic sulphite with dil. $H C l$ results in the evolution of $S O_{2}$ gas.
$K_{2} S O_{3} + 2 H C l \to 2 K C l + H_{2} O + S O_{2}$

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