Question

prove that hydrogen gas is liberated when acid reacts with metals​

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. The candle continues burning with a pop sound.

Answer 2

Answer:

.

Chemical species which donate proton or release H+ ions when dissolved in water are called acid. They turn blue litmus solution to red colour.

Hydrochloric acid reacts with zinc metal to produce zinc chloride and hydrogen gas. The reaction is given below:

Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

Hydrochloric acid reacts with Na2CO3 to produce carbon dioxide and turns the lime water milky as it forms calcium carbonate. The milkiness formed is disappeared when more than necessary carbon dioxide is passed through the solution. The reaction is as follows:

Na2CO3(s/aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g)

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq)

Explanation:

Thanks for asking brother God Bless You