[pure-silver] Re: sulfite in PMK working solution
- From: "Ole Tjugen" <oftjugen@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 28 Dec 2004 22:34:53 +0100
It's *about* in terms of weight percentage. It's *precise* in terms of
molarity.
But the molar weight of sodium and hydrogen are different, so it's not
exact in w/v pr cent.
Ole Tjugen
On Tue, 28 Dec 2004 16:06:36 -0500, Sandy King <sanking@xxxxxxxxxxx> wrote:
> According to Gordon Hutchings, from The Book of Pyro, a liter of
> working solution of PMK, using the standard 1:2:100 dilution,
> contains 0.02 grams of sodium sulfite. This would indicate that the
> sodium bisulfite in the stock solution (20 grams per 1000 ml of Stock
> A) is produced by the sodium bisulfite at a 1:1 ratio. Can anyone
> tell me if this is an *about* or *precise* rate of conversion?
>
> Also, would the substitution of sodium sulfite in the stock solution,
> assuming one were not concerned with longevity of the solution, be
> expected to work at the same pH and give the same results as when
> using sodium bisulfite?
>
> Sandy King
>
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