Question

name the gas liberated when an acid react with metallic carbonate? write the chemical equation of the reaction when this gas is passed through lime water what is the colour of the precipitation obtained in this reaction​

Answer 1

Answer:

Carbon dioxide gas is liberated when dilute hydrochloric acid reacts with sodium hydrogen carbonate. When the gas liberated in the reaction is passed through lime water, lime water turns milky or a white precipitate of calcium carbonate is formed.

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Answer 2

Carbon dioxide ( CO$_{2}$ ) is liberated when an acid react with a metallic carbonate .

• When Carbon dioxide ( CO$_{2}$ ) is passed through lime water [ Ca(OH)$_{2}$ ] ,  it turns milky due to the formation of calcium carbonate ( CaCO$_{3}$ ) . The chemical equation is -

        Ca(OH)$_{2}$ + CO$_{2}$ → CaCO$_{3}$ + H$_{2}$O

• The colour of the precipitation obtained in this reaction​ is white that is the colour of calcium carbonate .