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+ Inorganic chemistry
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Keith Johnson

What happens when anhydrous calcium chloride is exposed to air for some time?

Michael  Follow

Calcium Chloride is deliquescent. Anhydrous Calcium Chloride absorbs moisture from the atmosphere and dissolves in it forming an hygroscopic liquid.

This property of calcium chloride is used in the purification of HCL during its preparation to remove moisture from it. This is the exact same reason CaCL2 is stored in airtight bottles in laboratories.

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David Cable  Follow

Calcium chloride is deliquescent.

If exposed to air, it will absorb sufficient water from the air to allow it to dissolve. After a short while, instead of a white lump, you will have a pool of clear liquid.

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