Pt Plating (Kohlrausch Sol.)

[Gerd-Uwe Flechsig]

Patrick Martin schrieb:

> Hello,
>
> I've used and enjoyed Kohlrausch's solution for many a year, but now I have none
> and need to make it.  I've never done it before.  The refs say dissolve
> 3% PtCl2 and 0.25% PbAc in 0.025N HCl.  The PtCl2 sank to the bottom and didn't
> seem at all interested in dissolving.  I then went to the Merrick Index, which
> states that PtCl2 is insol. in water, which I had just empirically proved.
>
> I'm a tad confused.  If you are familliar with Kohlrausch's could you drop me a
> line clarifying how it is made?
>
> Thanks very much.
>
> Patrick

Hello,

I could imagine that PtCl2 will dissolve in conc. HCl because it needs the formation
of the hexachloro complex.

Greetings
Gerd