Chemistry

is KAl(SO4)2 12H2O hygroscopic, deliquescent, or efflorescent?

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asked by ben
  1. http://chemistry.about.com/od/growingcrystals/ig/Crystal-Photo-Gallery/Alum-Crystal.htm

    Those crystals are very stable in air.

    However, the unhydrated crystal, KAl(SO4)2 is a powdery compound that is hygroscopic in air, and crystallizes to form one of the hydrated crystals.

  2. How i am observed it

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