Aluminum Hydroxide as Amphoteric Acid with NaOH

Al(OH)3 + NaOH → NaAlO2 + 2H2O

개요

Aluminum hydroxide dissolves in sodium hydroxide solution, demonstrating its acidic character. The Al(OH)₃ acts as a Lewis acid, accepting OH⁻ to form the aluminate ion [Al(OH)₄]⁻. This amphoteric behavior is characteristic of elements near the metal-nonmetal boundary in the periodic table.

참여 물질

역할 물질 계수 상태
반응물 Aluminum Hydroxide Al(OH)₃ 1 (s)
반응물 Sodium Hydroxide NaOH 1 (aq)
생성물 Water H₂O 2 (l)

일상 속 예시

The Bayer process for aluminum production exploits this amphoteric behavior, dissolving aluminum oxide in NaOH to separate it from iron oxide impurities.

산업적 중요성

알루민산나트륨은 수처리 응집제, 제지 제조, 그리고 연간 1억 3천만 톤 이상의 알루미나를 생산하는 바이어 공정에 사용됩니다.

성질

유형
Acid-Base
가역 반응
아니오
에너지
발열
ΔH
-20.0 kJ/mol

관련 반응

Hydrochloric Acid and Barium Hydroxide Acetic Acid and Sodium Acetate Buffer System Acetic Acid Dissociation in Water Ammonia and Hydrochloric Acid Ascorbic Acid and Sodium Hydroxide Barium Hydroxide and Ammonium Thiocyanate (Endothermic) Carbonic Acid and Sodium Hydroxide Aluminum Chloride and Chloride Ion (Lewis Acid-Base) Acetic Acid and Sodium Hydroxide Neutralization Formic Acid and Sodium Hydroxide

Frequently Asked Questions

What is the equation for Aluminum Hydroxide as Amphoteric Acid with NaOH?
The balanced equation is: Al(OH)₃ + NaOH → NaAlO₂ + 2H₂O.
What type of reaction is Aluminum Hydroxide as Amphoteric Acid with NaOH?
Aluminum Hydroxide as Amphoteric Acid with NaOH is a acid-base reaction.
Is Aluminum Hydroxide as Amphoteric Acid with NaOH exothermic or endothermic?
Aluminum Hydroxide as Amphoteric Acid with NaOH is exothermic (releases energy). The enthalpy change (ΔH) is -20.0 kJ/mol.