Charles Steinmetz (csteinmetz@redneck.efga.org)
Sat, 05 Jun 1999 18:50:46 +0000
Liam wrote:
>Since distilled is expensive, it would be helpful to know when tap
>water is safe to use for chrysotype, so does anyone know of a way
>of measuring or estimating its chlorine content?
The first thing that comes to mind is titrating with silver nitrate.
When the cloudy precipitate no longer forms, the chlorine will
(essentially) all have been precipitated as silver chloride, and the
amount of silver nitrate used will allow you to calculate the chlorine
content. The problem with this procedure is that it is a difficult
titration -- the point where precipitation stops is not easily
determined. Light the sample well, and use a black background.
Alternatively, one could add silver nitrate to excess, then collect,
dry, and weigh the silver chloride. Again, this is difficult -- you
would need an analytical balance to weigh the small quantity of
silver chloride formed, and it would be subject to error due to loss
during washing and drying.
You might check pool stores -- perhaps there is a kit for measuring
the chlorine in pool water?
Best regards,
Charles
This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:39:36