Is sodium hydroxide an alkali?

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Detailed Solution

Yes, sodium hydroxide (NaOH) is an alkali.

Explanation:
An alkali is a base that dissolves in water and releases hydroxide ions (OH⁻) in solution. Sodium hydroxide is a strong base that completely dissolves in water to produce a high concentration of OH⁻ ions.

The reaction is:
NaOH (solid) → Na⁺ (aqueous) + OH⁻ (aqueous)

Because it dissolves fully and increases the alkalinity (pH) of water, sodium hydroxide is classified as an alkali. It is commonly used in industries like soap making, paper manufacturing, and chemical processing due to its strong alkaline properties.

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