Question

Name the salt which is a weak electrolyte and a base which is a weak electrolyte.

Answer 1

Weak electrolytes are those electrolytes which dissociates partially in the aqueous or molten state.

1. Sodium carbonate $\left({\mathrm{Na}}_2{\mathrm{CO}}_3\right)$ is an example of weak electrolyte salt.

$$\begin{gathered} {\mathrm{Na}}_2{\mathrm{CO}}_3\stackrel{{\mathrm{H}}_2\mathrm{O}}{\rightleftharpoons }2{\mathrm{Na}}^{+}+{\mathrm{CO}}_3^{2-} \\ (\mathrm{Sodium}(\mathrm{Sodium}\left(\mathrm{Carbonate} \\ \mathrm{carbonate}\right)\mathrm{ion})\mathrm{ion}) \end{gathered}$$

Carbonate ion will further dissociates into bicarbonate and hydroxide ion:-

$$\begin{gathered} {\mathrm{CO}}_3^{2-}\stackrel{{\mathrm{H}}_2\mathrm{O}}{\rightleftharpoons }{\mathrm{HCO}}_3^{-}+{\mathrm{OH}}^{-} \\ (\mathrm{carbonate}(\mathrm{Bicarbonate}(\mathrm{Hydroxide} \\ \mathrm{ion})\mathrm{ion})\mathrm{ion}) \end{gathered}$$

2. Ammonia $\left({\mathrm{NH}}_3\right)$ is a weak electrolytic base.

$$\begin{gathered} {\mathrm{NH}}_3\stackrel{{\mathrm{H}}_2\mathrm{O}}{\rightleftharpoons }{\mathrm{NH}}_4^{+}+{\mathrm{OH}}^{-} \\ \left(\mathrm{Ammonia}\right)(\mathrm{ammonium}(\mathrm{hydroxide} \\ \mathrm{ion})\mathrm{ion}) \end{gathered}$$