Phosphoric Acid Second Neutralization

H3PO4 + 2NaOH → Na2HPO4 + 2H2O

Descripción general

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.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Phosphoric Acid H₃PO₄ 1 (aq)
Reactivo Sodium Hydroxide NaOH 2 (aq)
Producto Water H₂O 2 (l)

Ejemplo cotidiano

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

Importancia industrial

Empleado como tampón en productos farmacéuticos, alimentos y como agente emulsionante en quesos procesados.

Propiedades

Tipo
Acid-Base
Reversible
No
Energía
Exotérmico
ΔH
-112,0 kJ/mol

Reacciones relacionadas

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.