Ca(NO<sub>3</sub>)<sub>2</sub> - Calcium nitrate

What is Calcium nitrate?

Calcium nitrate is an inorganic compound with the chemical formula Ca(NO3)2. Another name for Calcium nitrate is Norgessalpeter. It was synthesized by the Birkeland–Eyde process at Notodden, Norway in 1905. It is a nitrate salt of Calcium which contains calcium and nitrogen and oxygen. Calcium nitrate is a white gray granular solid which absorbs moisture from the air and is usually found as a tetrahydrate compound Ca(NO3)2.4H2O.

Ca(NO3)2

Calcium nitrate

Density

2.5 g/cm3

Molecular Weight/ Molar Mass

164.088 g/mol

Melting Point

561 °C

Boiling Point

132 °C

Compound Formula

‎CaN2O6

Calcium nitrate Structure – Ca(NO3)2

Calcium nitrate Structure

Preparation of Calcium nitrate – Ca(NO3)2

Calcium nitrate is a complex fertilizer. It can be prepared by any of the following methods.

  1. When calcium carbonate usually known as limestone is treated with nitric acid calcium nitrate is formed.

    The reaction is as follows.

    CaCO3 + 2HNO3 → Ca(NO3)2 + CO2 + H2O

  2. Calcium nitrate is also formed when ammonium nitrate solution is mixed with calcium hydroxide solution.

    The reaction is as follows.

    2NH4NO3 + Ca(OH)2 → Ca(NO3)2 + 2NH4OH

    Physical Properties of Calcium nitrate – Ca(NO3)2

Odour

No Odour

Appearance

White deliquescent granules

Vapor Pressure

49.800000 mm/Hg

Solubility

Soluble in acetone and alcohol, but insoluble in concentrated nitric acid.

Chemical Properties of Calcium nitrate – Ca(NO3)2

  1. On heating it undergoes decomposition and release nitrogen dioxide and oxygen.

    Ca(NO3)2 → CaO + 2 NO2 + ½ O2

  2. On adding calcium nitrate to sodium carbonate the precipitate of calcium carbonate is formed leaving sodium nitrate in solution.

    Ca(NO3)2 + Na2CO3 → 2 NaNO3 + CaCO3

Uses of Calcium nitrate – Ca(NO3)2

  • Used in agriculture as a fertilizer and in match manufacture as an oxidising agent.
  • It is also used in the explosives and pyrotechnics industries.
  • It is used to make fireworks and incandescent lamp chimney in light industry.
  • Used as a raw material in making other nitrate compounds.
  • Used to improve the storage quality of crops reducing bitter pit in apples.

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