Question

Name two metals that can displace Hydrogen from dilute Hydrochloric acid $\left(\mathrm{HCl}\right)$?

Answer 1

• Normally, active metals placed above hydrogen in the reactivity series are able to displace Hydrogen from dilute Hydrochloric acid.
• Metals on reaction with Hydrochloric acid produce corresponding metal chlorides and Hydrogen gas.
• Sodium and Magnesium react readily with Hydrochloric acid and thereby displacing the Hydrogen atom.
• The chemical reaction is as follows:

1. $\underset{\left(\mathrm{Sodium}\right)}{2\mathrm{Na}\left(\mathrm{s}\right)}+\underset{\left(\mathrm{Hydrochloric}\mathrm{acid}\right)}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\left(\mathrm{Sodium}\mathrm{chloride}\right)}{2\mathrm{NaCl}\left(\mathrm{s}\right)}+{\mathrm{H}}_2\left(\mathrm{g}\right)$
2. $\underset{\mathrm{Magnesium}}{\mathrm{Mg}\left(\mathrm{s}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Magnesium}\mathrm{chloride}}{{\mathrm{MgCl}}_2\left(\mathrm{s}\right)}+{\mathrm{H}}_2\left(\mathrm{g}\right)$