[pure-silver] Re: PMK
- From: Sandor Mathe <sandorm@xxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 28 Apr 2006 13:07:59 -0400
>Take oil and add as much water as you want and if the
>mixture stands still, the oil will always land up at the bottom.
The only mistake here is that the oil will be on the top!
The only thing people are debating is how long is long and how much
agitation is agitation.
My high school chemistry class had two 30-40 cm tall narrow glass
measuring cylinders on a high shelf. Both were filled with water.
One had a largish crystal of copper sulphate (greeninsh blue, soluble in
water) dropped in the bottom, the other some other crystal (potasium
permanganate maybe). They had been sitting there for more than year,
never touched. The both crystals were disolving and slowly the colour was
diffusing upwards. The copper sulphate had coloured the water only an
inch or two up. The top was still perfectly clear. The other one was
already almost completely uniform, though there was still a graduation in
colour from light to dark at the bottom. An excellent demonstration of
diffusion.
Sandor
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