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Encyclopedia > Calcium bicarbonate

Calcium bicarbonate (Ca(HCO3)2), also called calcium hydrogencarbonate, is a compound which exists only in solution. If a solution evaporates, the following reaction occurs: Ca(HCO3)2)(aq) → CO2(g) + H2O(l) + CaCO3(s). Carbon dioxide is an atmospheric gas composed of one carbon and two oxygen atoms. ... This article describes water from a scientific and technical perspective. ... Calcium carbonate is a chemical compound, with chemical formula CaCO3. ...


Calcium bicarbonate is formed when water containing carbon dioxide in solution (also known as carbonic acid) reacts with calcium carbonate. Carbon dioxide is an atmospheric gas composed of one carbon and two oxygen atoms. ... Carbonic acid is a weak acid with the chemical formula of H2 C O3. ... Calcium carbonate is a chemical compound, with chemical formula CaCO3. ...


This reaction is very important to the formation of stalactites, stalagmites, columns, and other speleothems within caves and, for that matter, in the formation of the caves themselves. Water containing atmospheric carbon dioxide passes through limestone, or other calcium carbonate containing minerals, converting part of the calcium carbonate to the bicarbonate, which is very water soluble. Later, in drier conditions, or upon a rise in temperature, the excess carbon dioxide is released from the solution of the bicarbonate, causing the much less soluble calcium carbonate to be deposited. A stalactice hanging above subterranean water. ... The Witchs Finger in the Carlsbad Caverns A stalagmite (Greek stalagma, drip) is a type of speleothem formed by the deposit of calcium carbonate which rises from the floor of a limestone cave due to the dripping of mineralized solutions. ... A speleothem (from the Greek for cave deposit) is a formal term for what is also known as a cave formation, or amongst cavers, collectively known as pretties. ... Alternate meanings: Cave (disambiguation) The outside world viewed from a cave A cave is a natural underground void. ... A substance is soluble in a fluid if it dissolves in the fluid. ...


The reaction is very temperature sensitive, with a rise in temperature easily driving carbon dioxide out of the calcium bicarbonate solution.


Reference

Baking Soda (http://www.newton.dep.anl.gov/askasci/chem99/chem99492.htm)

 

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