Al2O3 + HCl = AlCl3 + H2O

Balanced Chemical Equation – Solution

Al2O3 + 6HCl → 2AlCl3 + 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): Al2O3 is a base, HCl is an acid.

Ruby + Hydrogen Chloride = Aluminum Chloride + 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.

HCl – Chlorane

  • Other names: Hydrochloric acid.
  • Appearance: Colorless, transparent liquid, fumes in air if concentrated.


AlCl3 – Aluminium chloride

  • Other names: Aluminium(III) chloride.
  • Appearance: White or pale yellow solid | hygroscopic.

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
HCl + Al2O3 → HO3 + Al2Cl
HCl + Al2O3 → AlCl3 + HOH
HCl + Al2O3 → H2O + AlCl3

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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