Question

Sodium hydroxide is ______ alkali while ammonium hydroxide is ______ alkali. (weak/strong)

Answer 1

Sodium hydroxide is strong alkali while ammonium hydroxide is weak alkali.

Explanation:

Sodium hydroxide (NaOH) is classified as a strong alkali because it undergoes complete dissociation in an aqueous solution to produce a high concentration of hydroxide ions (OH⁻). On the other hand, ammonium hydroxide (NH₄OH) is a weak alkali because it only partially ionises in water, leaving most of its molecules undissociated. Consequently, sodium hydroxide forms a highly conductive, basic solution, while ammonium hydroxide yields a much lower concentration of OH⁻ ions.