Al2O3 + NaOH = NaAlO2 + H2O

Balanced Chemical Equation – Solution

Al2O3 + 2NaOH → 2NaAlO2 + H2O

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): Al2O3 is an acid, NaOH is a base.

Ruby + Sodium Hydroxide = Sodium Aluminate + 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.



  • Names: Aluminium oxide (Aluminum oxide).
  • Appearance: White solid.


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



  • Names: Sodium aluminate.
  • Appearance: White powder (sometimes light-yellowish) | hygroscopic/ when dissolved in water a colloidal black solution is formed.

H2O – Water, oxidane

  • Other names: Water (H2O), Hydrogen oxide, Hydrogen hydroxide.
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas.
Similar Examples of Equalizing a Chemical Reaction
NaOH + Al2O3 → H2O + NaAlO2
NaOH + Al2O3 → H2O + Na3AlO3
NaOH + Al2O3 → Al(OH)3 + Na2O
NaOH + Al2O3 + HF → H2O + Na3AlF6
H2O + NaOH + Al2O3 → NaAl(OH)4
H2O + NaOH + Al2O3 → Na3[Al(OH)6]
H2O + NaOH + Al2O3 → Na[Al(OH)4]
H2O + NaOH + Al2O3 → Na(Al(OH)4)

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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