salt or ester of carbonic acid
A carbonate is a chemical compound that has the carbonate ion, CO2−
3. This ion is made of carbon and oxygen. The name may also mean an ester of carbonic acid, an organic compound containing the carbonate group C(=O)(O–)2 of carbon and oxygen. They have a valency of 1.
|Systematic IUPAC name
|Molar mass||60.01 g mol-1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
When added to an acid, a carbonate will produce carbon dioxide, water and a chemical salt. Sedimentary rocks containing calcite and other carbonates are plentiful in the earth.