Chemistry
Give balanced equations for reactions involving evolution of a gas on addition of dilute acid to :
(a) sodium sulphite
(b) calcium carbonate
Chemical Reaction
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Answer
(a) Na2SO3 + H2SO4 [dil.] ⟶ Na2SO4 + H2O + SO2 [g]
Sulphur dioxide gas is evolved.
(b) CaCO3 + 2HCl [dil.] ⟶ CaCl2 + H2O + CO2 [g]
Carbon dioxide gas is evolved.
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