Phosphoric Acid Second Neutralization

H3PO4 + 2NaOH → Na2HPO4 + 2H2O

개요

Partial neutralization of phosphoric acid with two equivalents of NaOH produces disodium hydrogen phosphate. This salt forms solutions near pH 9.2 and is one component of the phosphate buffer system widely used in biochemistry. The dibasic form is the predominant species at physiological pH.

참여 물질

역할 물질 계수 상태
반응물 Phosphoric Acid H₃PO₄ 1 (aq)
반응물 Sodium Hydroxide NaOH 2 (aq)
생성물 Water H₂O 2 (l)

일상 속 예시

Phosphate buffer saline (PBS) used in biology labs contains disodium hydrogen phosphate to maintain pH around 7.4.

산업적 중요성

수소인산이나트륨은 식품 가공에서 유화제, 수처리, 의약품 제형에서 완충제로 사용됩니다.

성질

유형
Acid-Base
가역 반응
아니오
에너지
발열
ΔH
-112.0 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 Hydroxide as Amphoteric Acid with NaOH Aluminum Chloride and Chloride Ion (Lewis Acid-Base) Formic Acid and Sodium Hydroxide

Frequently Asked Questions

What is the equation for Phosphoric Acid Second Neutralization?
The balanced equation is: H₃PO₄ + 2NaOH → Na₂HPO₄ + 2H₂O.
What type of reaction is Phosphoric Acid Second Neutralization?
Phosphoric Acid Second Neutralization is a acid-base reaction.
Is Phosphoric Acid Second Neutralization exothermic or endothermic?
Phosphoric Acid Second Neutralization is exothermic (releases energy). The enthalpy change (ΔH) is -112.0 kJ/mol.