Phosphoric Acid Second Neutralization

H₃PO₄ + 2NaOH → Na₂HPO₄ + 2H₂O

نظرة عامة

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.

المشاركون

الدور	المادة	المعامل	الحالة
متفاعل	Phosphoric Acid H₃PO₄	1	(aq)
متفاعل	Sodium Hydroxide NaOH	2	(aq)
منتج	Water H₂O	2	(l)

مثال من الحياة اليومية

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

الأهمية الصناعية

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

الخصائص

النوع: Acid-Base
قابل للعكس: لا
الطاقة: طارد للحرارة
ΔH: -112,0 kJ/mol

التفاعلات ذات الصلة

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) Hydrochloric Acid and Sodium Hydroxide Neutralization Nitric Acid and Potassium Hydroxide Neutralization Hydrochloric Acid and Barium 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.