Question

Write the balanced chemical equation for the following action of dilute hydrochloric acid on sodium sulphide.

Answer 1

Reaction of dil. hydrochloric acid with sodium sulphide:

• Dilute hydrochloric acid decomposes the sulphides of weak to metal chloride and hydrogen sulphide.
• When sodium sulphide reacts with dilute Hydrochloric Acid, it will give sodium chloride and hydrogen sulphide gas as a product.

Balanced chemical equation :

$\underset{\mathrm{Sodium}\mathrm{sulphide}}{{\mathrm{Na}}_2\mathrm{S}\left(\mathrm{s}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{chloride}}{2\mathrm{NaCl}\left(\mathrm{aq}\right)}+\underset{\mathrm{Hydrogen}\mathrm{sulphide}}{{\mathrm{H}}_2\mathrm{S}\left(\mathrm{g}\right)}$

So, the action of dilute hydrochloric acid on sodium sulphide gives sodium chloride, and hydrogen sulphide gas as a product.