MgO + H2O = Mg(OH)2

Balanced Chemical Equation – Solution

MgO + H2O → Mg(OH)2

Equation is already balanced.

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

Magnesium Oxide + Water = Brucite

Reaction Type


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


MgO – Magnesium oxide

  • Other names: Magnesia.
  • Appearance: White powder.

H2O – Water, oxidane

  • Other names: Oil of vitriolSulfuric acid, concentrated (> 51% and < 100%).
  • Appearance: Clear, colorless liquid; Colorless to dark-brown, oily, odorless liquid; Odourless colourless oily hygroscopic liquid.


Mg(OH)2 – Magnesium hydroxide

  • Other names: Magnesium dihydroxide.
  • Appearance: White solid.
Similar Examples of Equalizing a Chemical Reaction
H2O + MgO + Na2HPO4 → H3PO4 + Na2MgO2
H2O + MgO → Mg(OH)2
H2O + MgO → MgO2H2
H2O + MgO + MgCl2 → Mg(OH)Cl

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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