Question

Write the balanced chemical equation when Hydrochloric acid reacts with Zinc?

Answer 1

When Hydrochloric acid $\mathbf{\left(}\mathbf{HCl}\mathbf{\right)}$reacts with Zinc $\mathbf{\left(}\mathbf{Zn}\mathbf{\right)}$, Zinc chloride $\mathbf{\left(}{\mathbf{ZnCl}}_{\mathbf{2}}\mathbf{\right)}\mathbf{}$is produced and Hydrogen$\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}\mathbf{\right)}$ gas is produced.

Step 1: Write the unbalanced chemical equation for the reaction
$\mathrm{Zn}\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\stackrel{∆}{\to }{\mathrm{ZnCl}}_2\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

Step 2: To balance the Hydrogen atoms, we will multiply $\mathrm{HCl}$with $2$
Resulting equation:
$\mathrm{Zn}\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\stackrel{∆}{\to }{\mathrm{ZnCl}}_2\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

Comparing both side we find an equal number of atoms are present on both side.
Hence, the equation is balanced.