Question

Identify the weak electrolyte from the following

• A. Sodium chloride solution
• B. Dilute Hydrochloric acid
• C. Dilute Sulfuric acid
• D. Aqueous acetic acid

Answer 1

The correct option is D

Aqueous acetic acid

Explanation for the correct option:

Option D:

1. Aqueous acetic acid is a weak electrolyte because it dissociates very less in solution to give respective ions ${\mathrm{CH}}_3{\mathrm{COO}}^{-}\mathrm{and}{\mathrm{H}}^{+}$
2. It ionizes only $1\%to10\%$in the solution.
3. It is a very poor conductor of electricity.

Explanation for the incorrect option:

Option B:

This is a very strong electrolyte. It dissociates completely into solution into ${\mathrm{H}}^{+}\mathrm{and}{\mathrm{Cl}}^{-}$ions.

Option C:

This is a strong electrolyte. It dissociates completely into solution as ${\mathrm{H}}^{+}\mathrm{and}{\mathrm{SO}}_4^{2-}$

Option A:

This is a strong electrolyte. It dissociates into ${\mathrm{Na}}^{+}\mathrm{and}{\mathrm{Cl}}^{-}$ions completely in solution. It is a very good conductor of electricity in solution.

Final answer: Hence, option (D) is correct. The weak electrolyte is Aqueous acetic acid.