Question

Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$ .

Answer 1

Reaction of metal with dilute hydrochloric acid

• Hydrogen gas is produced when dilute hydrochloric acid is added to a reactive metal.

• When dilute hydrochloric acid reacts with any reactive metal, either alkali metal or alkali earth metal, hydrogen gas is produced.

Reaction of iron with dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$

• When iron reacts with dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$, the following reaction takes place:

$$\begin{gathered} \mathrm{Fe}\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{FeSO}}_4\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right) \\ \left(\mathrm{iron}\right)(\mathrm{sulphuric}\mathrm{acid})(\mathrm{ferrous}\mathrm{sulphate})\left(\mathrm{hydrogen}\right) \end{gathered}$$