What is a confirmatory test to prove the effervescence of carbon dioxide in a reaction? Write the equations for the same.
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The gas thus formed is an effervescent carbon dioxide gas when calcium carbonate reacts with hydrochloric acid. The carbon dioxide gas also acts as an extinguisher for fires. Hence, the burning candle is extinguished. The metal compound A, therefore, constitutes calcium carbonate.
Hence metal compound A is CaCO3
The Gas evolved is CO2
Equation
The balanced equation of the reaction is
CaCO3 + 2HCl → CaCl2 + CO2 + H2O
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