Phosphoric Acid Complete Neutralization

H3PO4 + 3NaOH → Na3PO4 + 3H2O

Aperçu

Complete neutralization of triprotic phosphoric acid requires three equivalents of sodium hydroxide, producing trisodium phosphate (TSP). The resulting solution is strongly basic because the phosphate ion is a moderately strong base. TSP was once the workhorse of industrial and household cleaning.

Participants

Rôle Substance Coefficient État
Réactif Phosphoric Acid H₃PO₄ 1 (aq)
Réactif Sodium Hydroxide NaOH 3 (aq)
Produit Water H₂O 3 (l)

Exemple du quotidien

TSP was a common heavy-duty household cleaner for walls and surfaces before phosphate regulations limited its use due to water pollution concerns.

Importance industrielle

Trisodium phosphate is used in boiler water treatment, as a food additive, and in heavy-duty cleaning. Environmental phosphate bans have reduced its use in consumer products.

Propriétés

Type
Acid-Base
Réversible
Non
Énergie
Exothermique
ΔH
-173,0 kJ/mol

Réactions associées

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 Complete Neutralization?
The balanced equation is: H₃PO₄ + 3NaOH → Na₃PO₄ + 3H₂O.
What type of reaction is Phosphoric Acid Complete Neutralization?
Phosphoric Acid Complete Neutralization is a acid-base reaction.
Is Phosphoric Acid Complete Neutralization exothermic or endothermic?
Phosphoric Acid Complete Neutralization is exothermic (releases energy). The enthalpy change (ΔH) is -173.0 kJ/mol.