Ca(OH)2 + HNO3 = Ca(NO3)2 + H2O

Balanced Chemical Equation – Solution

Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O

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): Ca(OH)2 is a base, HNO3 is an acid.

Portlandite + Nitric Acid = Calcium Nitrate + 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.


Ca(OH)2 – Calcium hydroxide

HNO3 – Nitric acid

  • Other names: Aqua fortis.
  • Appearance: Colorless, yellow or red fuming liquid.



  • Names: Calcium nitrate.
  • Appearance: Colorless 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
HNO3 + Ca(OH)2 → Ca(NO3)2 + HOH
HNO3 + Ca(OH)2 → H2O + Ca(NO3)2

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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