Calcium carbonate reacts with hydrochloric acid to form calcium chloride, water and carbon dioxide. The reaction between these two compounds requires two parts hydrochloric acid to one part calcium chloride. This reaction is fairly rapid and energetic at high concentrations, in large part due to the high affinity of calcium ions for chloride ions.Continue Reading
Both of these compounds are ionic, with a hydrogen ion bound to a chloride ion in hydrochloric acid and a calcium ion bound to a carbonate group in calcium carbonate. The carbonate group is actually covalently bonded carbon and oxygen, but the calcium carbonate as a whole is ionic. Two chloride ions bond to one calcium ion. The high affinity of the hydrogen ions to oxygen splits apart the carbonate group, covalently bonding with one oxygen ion to form a water molecule. The carbonate group, stripped of one oxygen ion, becomes a neutral carbon dioxide molecule.
Stomach acid is hydrochloric acid, so calcium carbonate is commonly used as an antacid because the products of this reaction are harmless to humans. The body uses a somewhat similar compound, bicarbonate, to neutralize stomach acid on its own. Hydrochloric acid is also a component of acid rain. This can cause heavy erosion in limestone, which is largely composed of calcium carbonate.Learn more about Solutions & Mixtures
Aluminum reacts with hydrochloric acid. Aluminum is extremely reactive and undergoes several reactions. However, if one were to put a piece of aluminum foil in a beaker of hydrochloric acid, there may not be a reaction because of the oxide coating electrolytically applied during production. The reaction will occur with pure aluminum shavings.Full Answer >
Iron reacts with hydrochloric acid to produce dihydrogen and iron(II) chloride. When an HCl solution is added to iron powder, the H+ and Cl- ions from hydrochloric acid disassociate. The Cl- anions form ionic bonds with iron to form FeCl2. The H+ ions pair up, and release as hydrogen gas.Full Answer >
The Mentos and soda reaction results from the formation of carbon dioxide bubbles on the surface of the Mentos candy. The weight of the candy, which causes it to sink in the soda, also aids the reaction.Full Answer >
Calcium carbonate produces a weak chemical reaction with vinegar, which is an acetic acid, by releasing carbon dioxide. A simple experiment that demonstrates the reaction is to soak an egg, which has a calcium carbonate shell, in vinegar, which completely dissolves the shell in a matter of days.Full Answer >