Ivor and Olive Lewis on sun 13 jun 04
Dear Friends,
For those of you who would like good information about chemical =
compounds without buying one of the thick books may I suggest you =
consult The Merk Chemical Databases on line at =
www.chemdat.de/cdrl/catalog/stadard/en/index.html and bookmark for =
future use.
Try Sodium Carbonate>Chemical/physical Data in Product Info panel.
I found a melting point and a Boiling (decomposition) point of 1600=BA C
It pays to cross reference information regardless of how good you may =
believe your current source to be.
Best regards,
Ivor Lewis. Redhill, South Australia
Potters Council Member
Dewitt on sun 13 jun 04
At 01:59 AM 6/13/2004, you wrote:
>Dear Friends,
>For those of you who would like good information about chemical compounds=
=20
>without buying one of the thick books may I suggest you consult The Merk=20
>Chemical Databases on line at=20
>www.chemdat.de/cdrl/catalog/stadard/en/index.html and bookmark for future=
use.
>Try Sodium Carbonate>Chemical/physical Data in Product Info panel.
>I found a melting point and a Boiling (decomposition) point of 1600=BA C
>It pays to cross reference information regardless of how good you may=20
>believe your current source to be.
>Best regards,
>Ivor Lewis. Redhill, South Australia
>Potters Council Member
There is a typo in the url. It should be=20
http://www.chemdat.de/cdrl/catalog/standard/en/index.html
deg=20
John Britt on sun 13 jun 04
Ivor,
I did go to the site you suggested which is very nice, but it listed the
melting point at 854 C not 1600 C. Did I make a mistake?
It listed sodium hydrogen carbonate at 270 C for decomposition point.
Incidentally, sodium carbonate decahydrate melting point is listed as 33 C.
John Britt
Ivor and Olive Lewis on mon 14 jun 04
Sorry Friend,
My ineptitude.
Thanks for putting things right.
Best regards,
Ivor.
<<>www.chemdat.de/cdrl/catalog/stadard/en/index.html and bookmark for
future use.>>>
There is a typo in the url. It should be
http://www.chemdat.de/cdrl/catalog/standard/en/index.html
deg
Ivor and Olive Lewis on mon 14 jun 04
No John, I made a mistake in not clarifying the distinction between
the two changes.
Sodium bicarbonate undergoes a decomposition. Try two Mols of
Bicarbonate to give one Mol of water, a Moll of Na2CO3 and a Moll of
Carbon dioxide.
The Decahydrate seems to dissolve in its own water of crystallisation
as temperature rises but I cannot give a reference which might confirm
that as a fact.
You are keeping me on my toes aren't you !
Best regards,
Ivor Lewis. Redhill, South Australia
Potters Council Member
.
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