From owner-chemistry@ccl.net Sun Dec 6 18:12:01 2009 From: "Stephen Bowlus chezbowlus__comcast.net" To: CCL Subject: CCL: van't Hoff factor Message-Id: <-40872-091206175413-1606-3u75LiEG5MHT0i7ESU46DA[a]server.ccl.net> X-Original-From: Stephen Bowlus Content-Type: multipart/alternative; boundary=Apple-Mail-16-512482673 Date: Sun, 6 Dec 2009 14:54:00 -0800 Mime-Version: 1.0 (Apple Message framework v936) Sent to CCL by: Stephen Bowlus [chezbowlus(!)comcast.net] --Apple-Mail-16-512482673 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Are there some simple, structural rules of thumb (a qualitative SAR, if you will) that relate the van't Hoff factor to solution concentration? At infinite dilution, _i_ = number of particles possible from complete dissociation. From tables I have seen, it seems though, that different ions (and ion combinations) have different slopes in a plot of i vs [solute]. Is it possible to predict that slope for an ion/ion pair? Steve Bowlus --Apple-Mail-16-512482673 Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: 7bit Are there some simple, structural rules of thumb (a qualitative SAR, if you will) that relate the van't Hoff factor to solution concentration? At infinite dilution, _i_ = number of particles possible from complete dissociation. From tables I have seen, it seems though, that different ions (and ion combinations) have different slopes in a plot of i vs [solute]. Is it possible to predict that slope for an ion/ion pair?

Steve Bowlus

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