Just as a matter of interest. Does anyone know how to make/mix the
calibration solution for a pH meter?
Cheers, Roger B
NZ
On 19/04/2010, at 2:24 PM, poast wrote:
Hello Malcolm,
While I totally agree with you, it is just too much fun to simply
stop.
This batch will be played with to death and never consumed.
The saga continues.
I decided to add some baking soda to the solution to balance the
PH. The PH
had dropped to about 3 and I brought it back up to 6.8.
Next I added some ascorbic acid and it turned brown, then almost
immediately
turned clear again. I added more and the same thing happened.
More is
added and the same thing happens again.
Finally I ended up with a gray layer at the bottom of the jar, but
the rest
of the solution is clear. I just shook it up to see what happens.
The PH is now back to 4.6. Very interesting stuff. I hold it up
to the
light with the sun at my back and it looks bluish gray. When I
turn around
and look at the sun through the solution it looks dark amber.
I find it interesting that I still have a great Tyndal effect and
that the
solution is staying clear.
Oh well, I will exercise (or as Dok commented exOrcise) it a few
more times
and see what happens.
Thanks for your help in trying to figure this out.
Tom
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