Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: johnson039 on 04/03/2010 08:07:45

Title: Why calcium chloride cannot be used to dry ammonia gas?
Post by: johnson039 on 04/03/2010 08:07:45

anhydrous calcium chloride is a common drying agent due to its hygroscopic nature, but my in my textbook said CaCl2 cannot dry ammonia gas becoz of formation of additional product
wt's that?? [???]

Title: Why calcium chloride cannot be used to dry ammonia gas?
Post by: lightarrow on 04/03/2010 19:04:26

Quote from: johnson039 on 04/03/2010 08:07:45

anhydrous calcium chloride is a common drying agent due to its hygroscopic nature, but my in my textbook said CaCl2 cannot dry ammonia gas becoz of formation of additional product
wt's that?? [???]

CaCl₂ + 2NH₃ + 2H₂O ↔ Ca(OH)₂ + 2NH₄Cl

Title: Why calcium chloride cannot be used to dry ammonia gas?
Post by: Bored chemist on 04/03/2010 19:42:34

Also, in the same way that water forms a hydrate, NH3 forms an ammine. (Does the book say "additional" or "addition"?)

Title: Why calcium chloride cannot be used to dry ammonia gas?
Post by: johnson039 on 05/03/2010 00:19:56

does that mean formation of calcium complex ion? with NH3 as ligand?

Title: Why calcium chloride cannot be used to dry ammonia gas?
Post by: Bored chemist on 05/03/2010 06:50:12

Yes.

Title: Re: Why calcium chloride cannot be used to dry ammonia gas?
Post by: Mothernatura on 16/11/2012 20:29:43

I know it's an old post, but it usually is shown as google results searching this subject.

If useful to someone, this man had no problem at all mixing calcium chloride and ammonia...
http://es.scribd.com/doc/6599651/How-to-Build-a-Solar-Icemaker
Regards.