http://en.wikipedia.org/wiki/Sodium_sulfate
and, more to the point, http://en.wikipedia.org/wiki/Image:Na2SO4_solubility.png On 6/16/06, Tom C <[EMAIL PROTECTED]> wrote: > Thanks! I had sort of suspected that may be the case. Sodium Sulfate > apparently can combine with water to make a penta or a decahydrate. I > understand that the decahydrate form contains 10 parts H20 and the penta, > only 5, and was wondering why/when it would be in one form vs. the other. > > What I'm hoping for in the end is crystals of a granular size. Is there a > way to speed up the evaporation? > > > > Tom C. > > > > > > > >From: Mishka <[EMAIL PROTECTED]> > >Reply-To: Pentax-Discuss Mail List <[email protected]> > >To: "Pentax-Discuss Mail List" <[email protected]> > >Subject: Re: OT: Question for for the Chemists out there > >Date: Fri, 16 Jun 2006 14:52:52 -0400 > > > >proportion doesn't matter -- Na2SO4 . 10H2O will form from the solution > >anyway. > >just dissolve the anhydrous salt in a (minimal amount of ) hot water > >and put it in a > >fridge. > > > >On 6/16/06, Tom C <[EMAIL PROTECTED]> wrote: > > > (or even somebody a little more chemically literate than myself). I've > > > looked high and low for a simple formula I can understand to no avail. > > > > > > I have anhydrous sodium sulfate Na2SO4 and I want to mix it with water > >to > > > precipitate out in crystal form sodium sulfate decahydrate Na2SO4 . > >10H2O. > > > > > > What proportion of water to sodium sulfate is required? Any specific > > > temperature the solution should start out at? > > > > > > Don't ask why. :-) > > > > > > > > > > > > Tom C. > > > > > > > > > > > > -- > > > PDML Pentax-Discuss Mail List > > > [email protected] > > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > >-- > >PDML Pentax-Discuss Mail List > >[email protected] > >http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
