Phosphoric Acid and Sodium Hydroxide (First Neutralization)

H3PO4 + NaOH → NaH2PO4 + H2O

概要

The first neutralization step of the triprotic phosphoric acid produces monosodium phosphate and water. Phosphoric acid has three ionizable protons with Ka1 = 7.1 × 10⁻³, Ka2 = 6.3 × 10⁻⁸, and Ka3 = 4.2 × 10⁻¹³. Each successive proton is progressively harder to remove.

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 1 (aq)
生成物 Water H₂O 1 (l)

日常の例

Monosodium phosphate is used as a leavening agent in baking and as an emulsifier in processed cheese.

産業上の重要性

リン酸二水素ナトリウムは食品加工、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
-56.0 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 and Sodium Hydroxide (First Neutralization)?
The balanced equation is: H₃PO₄ + NaOH → NaH₂PO₄ + H₂O.
What type of reaction is Phosphoric Acid and Sodium Hydroxide (First Neutralization)?
Phosphoric Acid and Sodium Hydroxide (First Neutralization) is a acid-base reaction.
Is Phosphoric Acid and Sodium Hydroxide (First Neutralization) exothermic or endothermic?
Phosphoric Acid and Sodium Hydroxide (First Neutralization) is exothermic (releases energy). The enthalpy change (ΔH) is -56.0 kJ/mol.