Re: Extravagatype and Na2

[Linas Kudzma <lkudzma@earthlink.net>]

Erich,
   Yes, when I posted the Handbook of Chemistry and Physics data last week,
Jeffrey Mathias pointed out the apparent error with regard to K2PtCl4.

I had not seen the Michael Ware paper. Thanks for posting this data.

Linas

----- Original Message -----
From: "Erich Camerling" <e.camerling@freeler.nl>
To: "alt-photo" <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, May 18, 2002 1:04 PM
Subject: Re : Extravagatype and Na2


> Linas,
> The Handbook of Chemistry and Physics (the Rubber Bible) gives data for
the
> solubility (in grams per 100 ml H2O) by a given temperature (in degrees
> Celcius !) from the following Platinum salts :
> (NH4)2PtCl6              :    0.7 at  15    and      1.25  at   100
> (NH4)2PtCl4              :    soluble in cold and warm water
> Na2PtCl6                   :    soluble in cold water and very soluble in
> hot water
> Na2PtCl6.6H2O        :    66  at   15    and      very soluble in hot
water
> Na2PtCl4                   :    no data
> Na2PtCl4.4H2O        :    soluble in cold water
> K2PtCl6                    :    0.481 at 2    and     5.22  at  100
> K2PtCl4                    :    0.93   at  15  and    5.3    at  100
> (strange, for B&S sells a 20% solution ! )
>
> Michael Ware writes in his article " An investigation of Platinum  and
> Palladium Printing " (The Journal of Photographic Science .Vol .34,1986
> ,page 13 pp) that the solubility of Na2PtCl4 is some 17.8 at 20  and the
> solubility of (NH4)2PtCl4    is about 25 at 20.
>
> Erich
>
>