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

Explanation:

the metal compound A is CaCO3

the gas produced is CO2

Balanced eq = CaCO3 (s) + 2HCl (aq) ---- CaCl2(s) + CO2(g) + H2O(l)

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)

Thanks