Question

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride

Answer 1

         CaCO3         +          2 HCl          →        CaCl2          + H2O   +  CO2
Calcium Carbonate + HydroChloric Acid → Calcium Chloride + Water + Carbon                                                                                                            Dioxide

Answer 2

Answer

As metal compound released is Calcium Chloride the gas evolved here is CO2. Hence metal A should be Calcium Carbonate. Hence the reaction between Calcium Carbonate and HCl is

CaCO3 (s) + 2HCl (Aq) → CaCl2( Aq) + CO2 (g) + H2O (l)

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