What is Calcium Carbonate?

Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite and is the main component of eggshells, snail shells, seashells, and pearls. CaCO3 is the active ingredient in agricultural lime and is created when calcium ions in hard water react with carbonate ions to create limescale. It has medical use as a calcium supplement or as an antacid, but excessive consumption can be hazardous and cause poor digestion. It is a non-toxic and odorless compound commonly found as a white mineral that occurs naturally in chalks, limestones, and marbles.

Properties of Calcium carbonate

Chemical formula CaCO3
Molecular Weight 100.0869 g/mol
Density 2.71 g/cm³
Boiling Point Decomposes at 899 °C
Melting Point 825 °C

Application of Calcium Carbonate

  • It can be used as a filter and pigment, making possible the production of a whiter, higher quality pigment than other minerals.
  • Calcium carbonate is used as a filler in concrete, increasing its durability and appearance and purifying metals for use in construction applications.
  • Another application of CaCO3 is in fertilizers to provide calcium to plants and pH stabilization of the soil.
  • CaCO3 can also be an additive to food products for livestock animals and humans and as a supplement in vitamins.

Uses of CaCO3

  • Used as a dietary supplement when the quantity of calcium in the diet is less
  • It is used as an antacid to relieve stomach upset, heartburn
  • Used to purify iron from iron ore
  • CaCO3 used in the refining of sugar
  • It is used in agriculture to neutralize acidic soil
  • Used as a scrubbing agent in household cleaning powders
  • It is used in the construction of buildings and roads

Structure of Calcium Carbonate

Calcium Carbonate-Structure

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