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Calcium chloride was apparently discovered in the 15th century but wasn't studied properly until the 18th century. [11] It was historically called "fixed sal ammoniac" (Latin: sal ammoniacum fixum [12]) because it was synthesized during the distillation of ammonium chloride with lime and was nonvolatile (while the former appeared to sublime); in more modern times (18th-19th cc.) it was called ...
Calcium chloride; Calcium hydride; Calcium oxide; Calcium sulfate (Drierite) Cobalt(II) chloride; Copper(II) sulfate; Lithium chloride; Lithium bromide; Magnesium ...
Calcium(I) chloride (CaCl) is a diatomic molecule observed in certain gases. [1] A solid with the composition CaCl was reported in 1953; [2] however, later efforts to reproduce this work failed. [3] Molecules of CaCl have been observed in the atmospheres of carbon stars. [4]
When all the available Na + ions have been replaced with calcium or magnesium ions, the resin must be recharged by eluting the Ca 2+ and Mg 2+ ions using a solution of sodium chloride or sodium hydroxide, depending on the type of resin used. [10] For anionic resins, regeneration typically uses a solution of sodium hydroxide or potassium hydroxide.
Ammonium chloride precipitates and is removed by filtration, and the solution is recycled to produce more sodium carbonate. Hou's process eliminates the production of calcium chloride. The byproduct ammonium chloride can be refined, used as a fertilizer and may have greater commercial value than CaCl 2, thus reducing the extent of waste beds.
Calcium chloride (CaCl 2) is the most efficient and least expensive accelerator [4] and was formerly very popular. However, chloride anions are very corrosive for the steel of the reinforcement bars (rebars) so its use is no longer recommended [ 5 ] and in many countries actually prohibited.
Calcium hypochlorite is commonly used to sanitize public swimming pools and disinfect drinking water. Generally the commercial substances are sold with a purity of 65% to 73% with other chemicals present, such as calcium chloride and calcium carbonate, resulting from the manufacturing process.
Calcium hydroxychloride is sometimes confused with calcium hypochlorite. Calcium hydroxychloride is a double salt, which consists of calcium cations Ca 2+ and two kinds of anions, chloride Cl − and hydroxide − OH, while calcium hypochlorite consists of calcium cations Ca 2+ and only one kind of anions, hypochlorite − OCl.
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