HNO3 - 3-1-2005 at 21:12
After a bromine production went terribly wrong, I neutralized the resulting solutions with about 15g of my 30g of sodium thio. And since I'm not
going to give up on bromine so easily...
I need to make or aquire some sodium thio
and I don't know how (seeing as my Encylopedia Britanica doesn't have any info).
Organikum - 3-1-2005 at 23:21
Here where I live sodium thiosulfate can be bought OTC for removing the color from decolorized clothes.
S.C. Wack - 3-1-2005 at 23:53
Boil Na2SO3 with S. Or start with bisulfite if this is preferable, adding Na2CO3 to give the sulfite.
HNO3 - 4-1-2005 at 16:55
Org: you wouldn't have a brand name, would you?
S.C.Wack: Maybe I'm just dumb but I con't remember seeing any OTC sources of sodium sulfite.
Marvin - 4-1-2005 at 18:26
Sodium metabisulphite is used in home winemaking. One mole hydrolyses to 2 of sodium hydrogen sulphite.
Pyrovus - 4-1-2005 at 20:16
You could use the reaction between S and hot NaOH solution:
(unbalanced) NaOH + S -> Na2S2O3
+ Na2Sx
Use this
lvjrf - 5-1-2005 at 04:43
2NaHS + 2O2 -----> Na2S2O3 + H2O
good luck
chemoleo - 5-1-2005 at 15:18
Sodium sulphite Na2SO3 , or the bisulphite is easily made by bubbling SO2 (i.e. from sulphur burning) through NaOH. Once the solution stops absorbing
SO2, you will have a NaHSO3 (bisulphite) solution. This you can turn to the sulphite Na2SO3 by adding a calculated amount of NaOH (which you know
from the amount of NaOH used to bubble SO2 through it).
Then, to make the thiosulphate, boil this Na2SO3 solution with excess solid sulphur to obtain the thiosulphate.
[Edited on 6-1-2005 by chemoleo]
HNO3 - 5-1-2005 at 15:40
Unfortunately, I don't have a scale and won't have one for ~5 months.
I
do have good volume measuring equipment, though.
Mr. Wizard - 5-1-2005 at 15:42
In the interests of using cheaper and more available supplies, couldn't we use Sodium Carbonate (washing soda) or even Sodium Bicarbonate (baking
soda) and bubble the SO2 through them? Then the resultant Sodium Sulfite could be boiled with the Sulfur. The SO2 makes a fairly strong acid, that
should free CO2 from Carbonates.
hodges - 5-1-2005 at 16:10
Isn't sodium thiosulfate the main ingredient in many photographic development fixers? Unless you need high purity, try a photographic shop.