Question

Which acid is the best conductor of electricity?

Answer 1

• Acids are the substances that produce proton $\left({\mathrm{H}}^{+}\right)$ or hydronium ion $\left({\mathrm{H}}_3{\mathrm{O}}^{+}\right)$ ion in an aqueous solution.
• Acids have generally $\mathrm{pH}$ lower than 7.
• Strong acids are those which completely ionized in an aqueous solution.
• Hydrochloric acid $\left(\mathrm{HCl}\right)$and Sulphuric acid$\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ are the strongest acids that dissolve completely in an aqueous solution.
  $\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}\left(\mathrm{aq}\right)}\stackrel{\mathrm{Water}}{\to }\underset{\mathrm{Hydronium}\mathrm{ion}}{{\mathrm{H}}_3{\mathrm{O}}^{+}\left(\mathrm{aq}\right)}+\underset{\mathrm{Chloride}\mathrm{ion}}{{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right)}$
• As the solution contains ions that can freely move in the solution and help in conducting electricity.

Thus, Hydrochloric acid and Sulphuric acid are the best conductors of electricity.