Question

When dilute $\mathrm{HCl}$ reacts with Zinc metal, which gas is liberated?

Answer 1

Zinc:

• The zinc belongs to $\mathrm{d}-$block elements.
• Its atomic number is $30$.
• It is a silvery greyish metal.
• It is used in the galvanization of metals, and the manufacture of steel, rubber, paint and alloys.

Reaction:

• When zinc reacts with dilute $\mathrm{HCl}$, zinc chloride salt is formed and hydrogen gas is liberated.
• The hydrogen gas is produced as a bubble.
• The reaction is a simple displacement reaction.

$$\begin{gathered} \mathrm{Zn}\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{ZnCl}}_2\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right) \\ (\mathrm{Zinc}(\mathrm{dil}.\mathrm{Hydrochloric}(\mathrm{Zinc}\mathrm{chloride})(\mathrm{Hydrogen}\mathrm{gas}) \\ \mathrm{metal})\mathrm{acid}) \end{gathered}$$