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Calcium Chloride is widely used |
| Author : Date : 8/4/2011 12:44:12 AM |
Calcium Chloride is widely used because the anhydrous salt is strongly hygroscopic, air or other gases may be channeled through a column of calcium chloride to remove moisture. In particular, calcium chloride is usually used to pack drying tubes to exclude atmospheric moisture from a reaction set-up while allowing gases to escape.
Calcium Chloride cannot, however, be used to dry alkaline gases such as ammonia because it will form addition products. It is used to dry kelp, which is then used to produce soda ash. It can also be added to liquids to remove suspended or dissolved water. |
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The dissolving process is highly exothermic and rapidly produces temperatures of around 60 °C (140 °F). In this capacity, it is known as a drying agent or desiccant. It is converted to a brine as it adsorbs the water or water vapor from the substance to be dried:
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Calcium chloride
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