Question

What are strong electrolytes?

Answer 1

Strong electrolytes:

1. Substances that completely dissociate into ions are called strong electrolytes.
2. The dissociation of a strong electrolyte is apparent by its reaction arrow, which only points toward products. In contrast, the reaction arrow of weak electrolyte points in both directions.
3. The general form of the strong electrolyte equation is:

$\mathrm{Strong}\mathrm{electrolyte}\left(\mathrm{aq}\right)\to {\mathrm{Cation}}^{+}\left(\mathrm{aq}\right)+{\mathrm{Anion}}^{-}\left(\mathrm{aq}\right)$

4. Example: Sodium chloride, Potassium chloride, Lead bromide, Sodium hydroxide, Potassium hydroxide, Hydrochloric acid, Nitric acid, Sulfuric acid, etc.

5. When Sulphuric acid is dissolved in water it completely dissociates into its constituent ions i.e. Hydrogen and Sulphate ions.

$\underset{\mathrm{Sulpuric}\mathrm{Acid}}{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Hydrogen}\mathrm{ion}}{2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)}+\underset{\mathrm{Sulphate}\mathrm{ion}}{{{\mathrm{SO}}_4}^{2-}\left(\mathrm{aq}\right)}$

6. Mostly strong electrolytes are strong acids, strong bases, and salts.

Therefore, strong electrolytes are those substances that dissociates completely.