2007-03-20 12:26:59 · 3 answers · asked by blessing 1 in Science & Mathematics ➔ Chemistry
It's made by electrolysis of molten calcium chloride salt in much the same way magnesium or sodium is made. The anode (+ electrode) forms chlorine gas (which is tapped off and collected for sale also), and the cathode (at the bottom) forms the calcium metal. The electrolysis units are usually made from graphite and are lined with limestone or magenesia.
Once you have electrolyzed it, it can be further purified by recrystallization or sublimation of a melt in an inert atmosphere.
2007-03-20 12:35:43 · answer #1 · answered by Anonymous · 0⤊ 0⤋
It is extracted by electrolysis of a molten calcium salt. The calcium ions are attracted to the cathode (-ve charged electrode) and collect here. The process is performed under an inert gas since the calcium will react immediately with oxygen and water when exposed to air.
2007-03-20 19:32:21 · answer #2 · answered by davidbgreensmith 4 · 0⤊ 0⤋
Good old days.
http://en.wikisource.org/wiki/1911_Encyclop%C3%A6dia_Britannica/Calcium
2007-03-20 19:37:31 · answer #3 · answered by Mike1942f 7 · 0⤊ 0⤋