Sodium Hydroxide and Phosphoric Acid

3NaOH + H3PO4 → Na3PO4 + 3H2O

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Phosphoric Acid H₃PO₄ 1 (aq)
Reaktant Sodium Hydroxide NaOH 3 (aq)
Produkt Water H₂O 3 (l)

Alltägliches Beispiel

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

Industrielle Bedeutung

Sodium phosphates are used in food processing, water treatment, cleaning products, and as buffering agents. Environmental phosphate regulations have changed their industrial use patterns.

Eigenschaften

Typ
Double Replacement
Reversibel
Nein
Energie
Exotherm
ΔH
-173,0 kJ/mol

Verwandte Reaktionen

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.