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
Numa HussainMaster
The reaction you’re describing involves a metal compound A reacting with dilute hydrochloric acid (HCl) to produce effervescence, and the gas evolved extinguishes a burning candle. This reaction suggests the formation of hydrogen gas (H2) because hydrogen gas can extinguish a flame.
The balanced chemical equation for this reaction, assuming the formation of calcium chloride (CaCl2) as one of the products, is as follows:
CaCO3 + 2HCl -> CaCl2 + H2O + CO2
In this equation:
CaCO3 represents calcium carbonate, which is the metal compound A.
2HCl represents dilute hydrochloric acid.
CaCl2 represents calcium chloride, one of the products.
H2O represents water.
CO2 represents carbon dioxide gas, which is responsible for the effervescence.
The gas evolved (H2) can extinguish a burning candle because it displaces oxygen and disrupts the combustion process by reducing the oxygen concentration in the vicinity of the flame.