CaCO3 - Calcium carbonate

What is Calcium carbonate?

Calcium carbonate is a odourless chemical compound. It is water insoluble source of calcium. It is mainly found in rocks and is carbonic salt of calcium. Some of the pure calcium carbonate minerals are Calcite, Vaterite, Aragonite. Biological sources of calcium carbonate are Snail shells, Egg shells, Oyster shells etc. Mostly used as an antacid or calcium supplement. PH value is about 9.91. Its common name is limestone.

Properties of Calcium carbonate CaCO3

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

Calcium carbonate structure CaCO3

Calcium carbonate structure

Calcium carbonate uses

  • It is 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
  • It is used in to purify iron from iron ore
  • It is used in the refining of sugar
  • It is used in agriculture to neutralize acidic soil
  • It is used as scrubbing agent in household cleaning powders
  • It is used in the construction of buildings and roads

Frequently Asked Questions

What are the uses of calcium carbonate?

Calcium carbonate is a dietary supplement that is used when the calcium contained in the diet is not adequate. For healthy bones, muscles, nervous system and heart, the body requires calcium. Often, calcium carbonate is used as an antacid to relieve heartburn, acid indigestion and stomach discomfort.

Is calcium carbonate acidic or basic?

Calcium carbonate is the salt of a strong base (due to the presence of the calcium ion) and a weak acid (due to the presence of the carbonate ion, usually derived from carbonic acid). Therefore, this salt is mildly basic in nature.

How is calcium carbonate prepared?

Mining or quarrying activities are responsible for the production of a vast majority of calcium carbonate used in industry. It is possible to obtain pure calcium carbonate (e.g. for food or medicinal use) from a pure quarry source like marble. Calcium carbonate can also be prepared from calcium oxide.

Learn more about the chemical behavior and importance of calcium carbonate with the expert faculties at BYJU’S.

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