Phosphoric Acid Second Neutralization

H₃PO₄ + 2NaOH → Na₂HPO₄ + 2H₂O

Обзор

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.

Участники

Роль	Вещество	Коэффициент	Состояние
Реагент	Phosphoric Acid H₃PO₄	1	(aq)
Реагент	Sodium Hydroxide NaOH	2	(aq)
Продукт	Water H₂O	2	(l)

Пример из жизни

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

Промышленное значение

Disodium hydrogen phosphate is used in food processing as an emulsifier, in water treatment, and in pharmaceutical formulations as a buffering agent.

Свойства

Тип: Acid-Base
Обратимая: Нет
Энергия: Экзотермическая
ΔH: -112,0 kJ/mol

Связанные реакции

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.