Sodium Hydroxide and Phosphoric Acid

3NaOH + H₃PO₄ → Na₃PO₄ + 3H₂O

Descripción general

Sodium hydroxide reacts with phosphoric acid in a 3:1 ratio to completely neutralize the triprotic acid, forming trisodium phosphate and water. Partial neutralization gives mono- or disodium phosphate depending on the molar ratio. Each salt has different industrial applications.

Participantes

Rol	Sustancia	Coeficiente	Estado
Reactivo	Phosphoric Acid H₃PO₄	1	(aq)
Reactivo	Sodium Hydroxide NaOH	3	(aq)
Producto	Water H₂O	3	(l)

Ejemplo cotidiano

Trisodium phosphate (TSP) was once the main ingredient in heavy-duty household cleaners and dishwasher detergents before environmental regulations limited phosphate use.

Importancia industrial

Base de la producción de fosfatos de sodio para detergentes, alimentos y tratamiento de calderas industriales.

Propiedades

Tipo: Double Replacement
Reversible: No
Energía: Exotérmico
ΔH: -173,0 kJ/mol

Reacciones relacionadas

Iron(III) Chloride and Sodium Hydroxide Ammonia and Hydrochloric Acid (White Smoke) Calcium Carbonate and Hydrochloric Acid Calcium Chloride and Sodium Carbonate Barium Chloride and Sodium Sulfate Precipitation Calcium Hydroxide and Carbon Dioxide (Limewater Test) Sodium Hydroxide and Iron(III) Chloride (Rust Color) Sodium Hydroxide and Hydrochloric Acid Neutralization Potassium Hydroxide and Sulfuric Acid Aluminum Hydroxide and Hydrochloric Acid

Frequently Asked Questions

What is the equation for Sodium Hydroxide and Phosphoric Acid?

The balanced equation is: 3NaOH + H₃PO₄ → Na₃PO₄ + 3H₂O.

What type of reaction is Sodium Hydroxide and Phosphoric Acid?

Sodium Hydroxide and Phosphoric Acid is a double replacement reaction.

Is Sodium Hydroxide and Phosphoric Acid exothermic or endothermic?

Sodium Hydroxide and Phosphoric Acid is exothermic (releases energy). The enthalpy change (ΔH) is -173.0 kJ/mol.