Question

What are the gases liberated when the dilute hydrochloric acid react with. zinc ,and zinc carbonate ,suggest the experiment to identify the gas dry hydrogen chloride gas does not exhibit acid property why

Answer 1

Case 1)

Name the gas liberated when dilute hydrochloric acid reacts with zinc.

Dilute Acid + Metal → Salt + Hydrogen gas

$\sf{2HCl \:+\: Zn\:\rightarrow\:ZnCl_2\: + \:H_2}$

When hydrochloric acid reacts with zinc metal hydrogen gas is liberated.

How to check presence of hydrogen gas?

→ We can check the presence of hydrogen gas by bringing a burning candle near it. If hydrogen gas is present then it will produce a pop sound, which confirms the presence of hydrogen gas.

Case 2)

Name the gas liberated when dilute hydrochloric acid reacts with zinc carbonate.

$\sf{2HCl\:+\:ZnCO_3\:\rightarrow\:ZnCl_2\:+\:H_2O\:+\:CO_2}$

When hydrochloric acid reacts with zinc carbonate carbon dioxide gas is liberated.

How to check presence of carbon dioxide gas?

→ By lime water test. When carbon dioxide is passed through lime water; if it turns milky then carbon dioxide is present in it.