Phosphoric Acid Second Neutralization

H3PO4 + 2NaOH → Na2HPO4 + 2H2O

概要

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.

参加者

役割 物質 係数 状態
反応物 Phosphoric Acid H₃PO₄ 1 (aq)
反応物 Sodium Hydroxide NaOH 2 (aq)
生成物 Water H₂O 2 (l)

日常の例

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

産業上の重要性

リン酸水素二ナトリウムは食品加工での乳化剤、水処理、医薬品製剤の緩衝剤として使用される。

特性

タイプ
Acid-Base
可逆的
いいえ
エネルギー
発熱性
ΔH
-112.0 kJ/mol

関連する反応

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.