calcium carbonate wikipedia - EAS
Calcium carbonate - Wikipedia
https://en.wikipedia.org/wiki/Calcium_carbonateCalcium carbonate is a chemical compound with the formula Ca CO 3.It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which is a type of sedimentary rock consisting mainly of calcite) and is the main component of eggshells, gastropod shells, shellfish skeletons and pearls.Calcium carbonate is the active ingredient in agricultural …
Calcium — Wikipédia
https://fr.wikipedia.org/wiki/CalciumLe calcium est l'élément chimique de numéro atomique 20, de symbole Ca.. C'est un métal alcalino-terreux gris-blanc et assez dur. Il n'existe pas à l'état de corps pur dans la nature. C'est le cinquième élément le plus abondant de la croûte terrestre (plus de 3 %). Il est vital pour de nombreuses espèces : formation des os, des dents et des coquilles (il compose 1 à 2 % du …
Carbonate de calcium — Wikipédia
https://fr.wikipedia.org/wiki/Carbonate_de_calciumLe carbonate de calcium (Ca C O 3) est composé d'ions carbonate (CO 3 2−) et d'ions calcium (Ca 2+).Cette substance blanche a une masse molaire de 100,1 g/mol. . Le carbonate de calcium est le composant majeur des calcaires comme la craie, mais également du marbre.C'est aussi le constituant principal des coquilles d'animaux marins, du corail et des escargots, ainsi …
Hard water - Wikipedia
https://en.wikipedia.org/wiki/Hard_waterTemporary hardness is caused by the presence of dissolved bicarbonate minerals (calcium bicarbonate and magnesium bicarbonate).When dissolved, these type of minerals yield calcium and magnesium cations (Ca 2+, Mg 2+) and carbonate and bicarbonate anions (CO 2− 3 and HCO − 3).The presence of the metal cations makes the water hard.
Lime (material) - Wikipedia
https://en.wikipedia.org/wiki/Lime_(material)Lime is a calcium-containing inorganic material composed primarily of oxides and hydroxide, usually calcium oxide and/or calcium hydroxide.It is also the name for calcium oxide which occurs as a product of coal-seam fires and in altered limestone xenoliths in volcanic ejecta. The International Mineralogical Association recognizes lime as a mineral with the chemical formula …
Calcium hypochlorite - Wikipedia
https://en.wikipedia.org/wiki/Calcium_hypochloriteCalcium hypochlorite is an inorganic compound with formula Ca(OCl)Cl. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent. This compound is relatively stable and has greater available chlorine than sodium hypochlorite. It is a white solid, although commercial …
Travertine - Wikipedia
https://en.wikipedia.org/wiki/TravertineTravertine (/ ˈ t r æ v ər ˌ t iː n / TRAV-ər-teen) is a form of terrestrial limestone deposited around mineral springs, especially hot springs.It often has a fibrous or concentric appearance and exists in white, tan, cream-colored, and even rusty varieties. It is formed by a process of rapid precipitation of calcium carbonate, often at the mouth of a hot spring or in a limestone cave.
Calcium oxide - Wikipedia
https://en.wikipedia.org/wiki/Calcium_oxidePreparation. Calcium oxide is usually made by the thermal decomposition of materials, such as limestone or seashells, that contain calcium carbonate (CaCO 3; mineral calcite) in a lime kiln.This is accomplished by heating the material to above 825 °C (1,517 °F), a process called calcination or lime-burning, to liberate a molecule of carbon dioxide (CO 2), leaving quicklime.
Sodium hydroxide - Wikipedia
https://en.wikipedia.org/wiki/Sodium_hydroxideSodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na + and hydroxide anions OH −.. Sodium hydroxide is a highly caustic base and alkali that decomposes proteins at ordinary ambient temperatures and may cause severe chemical burns.It is highly soluble in …
Otolithe — Wikipédia
https://fr.wikipedia.org/wiki/OtolitheLe carbonate de calcium qui constitue les otolithes des poissons est sous la forme de cristaux jumelés d'aragonite [6]. Les cristaux d'aragonite sont disposés de manière concentrique autour du nucleus (partie centrale de l'otolithe) et enrobés dans une matrice d'otoline [ 7 ] relativement uniforme et similaire chez les différents groupes ...