Question

What are the gases liberated when dilute HCl acid reacts with a)zinc,b)zinc carbonate.
Suggest the experiments to identify these gases.
Dry hydrogen chloride gas does not exhibit acidic property.why?

Answer 1

Answer:

Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.

When zinc is reacted with HCl it produces zinc chloride salt and water whereas when zin carbonate is reacted with HCl, zinc chloride salt is produced along with carbon dioxide and water.

Dry HCl gas does not release H+ ions and hence, the acidic property of gas is not imparted.

Explanation:

I hope it helps you

Answer 2

Here is your answer:

The gases liberated are (a) Hydrogen in the case of zinc and (b) Carbon dioxide in the case of Zinc Carbonate.

Zn+ Hcl --》ZnCl + H2

ZnCo3+ Hcl --》 Co2 + H20 + ZnCl2

Hydrogen could be identified by lighting a matchstick

and hydrogen will burn with a pop sound.

If you pass Co2 through Ca(OH)2 solution , it will appear milky in colour.

HCl does not exhibit acidic properties in the abscence of water because only diluted Acids will produce H+ ions which is necessary for acidic ppties.