NaOH + H3PO4 = Na3PO4 + H2O

Balanced Chemical Equation – Solution

3NaOH + H3PO4 → Na3PO4 + 3H2O

The coefficients show the number of particles (atoms or molecules), and the indices show the number of atoms that make up the molecule. New substances are formed as a result of the rearrangement of the original atoms. As a result of a chemical reaction, atoms of chemical elements do not disappear anywhere and new ones do not appear, their number remains unchanged – this follows from the law of conservation of mass of substances.

Chemical Reaction Information

This is an acid-base reaction (neutralization): NaOH is a base, H3PO4 is an acid.

Sodium Hydroxide + Phosphoric Acid = Trisodium Phosphate + Water

Reaction Type

Double Displacement (Metathesis)

Substances that react are called starting materials or reactants. The substances that form as a result are called reaction products.



  • Other names: Oil of vitriolSulfuric acid, concentrated (> 51% and < 100%).
  • Appearance: White, waxy, opaque crystals; White hygroscopic solid in various forms.


  • Names: Phosphoric acid.
  • Appearance: Hygroscopic colourless crystals.


NaNO3 – Sodium nitrate

  • Other names: Peru saltpeter.
  • Appearance: White powder or colorless crystals.

Na3PO4 – Trisodium phosphate

  • Other names: Sodium phosphate tribasic.
  • Appearance: Colourless-to-white hygroscopic crystals.
Similar Examples of Equalizing a Chemical Reaction
NaOH + H3PO4 → H2O + Na2HPO4 + NaH2PO4
NaOH + H3PO4 → Na3PO4 + HOH
NaOH + H3PO4 → Na3PO4 + HHO
NaOH + H3PO4 → H2O + Na3(PO4)
NaOH + H3PO4 → H2O + NaH2PO4
NaOH + H3PO4 → H2O + Na2HPO4
NaOH + H3PO4 → Na(PO4) + H3OH
NaOH + H3PO4 → H2O + Na3PO4
NaOH + H3PO4 → H2O + Na3PO4*H2O

Alexander Stephenson

Candidate of Chemical Sciences, editor-in-chief of Lecturer at several international online schools, member of the jury of chemistry competitions and author of scientific articles.

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