rookee (Stranger)
04-23-02 09:20
No 300390
      how to make sodium dichromate?  Bookmark   

SWIM has access to lots of unwatched/uncontrolled substances but fucking no way to get this sodium dichromate.
is there any way to synthesise it easily???

greets
rookee
 
 
 
 
    Rhodium
(Chief Bee)
04-23-02 12:01
No 300413
      potassium dichromate  Bookmark   

../rhodium/chemistry /potassium.dichromate.html
 
 
 
 
    rookee
(Stranger)
04-23-02 21:22
No 300507
      so i just have to exchange potassium with sodium?  Bookmark   

so i just have to exchange potassium with sodium?
i.e. NaOH instead of KOH??? tongue
thanks
 
 
 
 
    psychokitty
(Her Majesty, Stoni's Kitty)
04-23-02 22:02
No 300518
      Don't make it, buy it.  Bookmark   

Don't make it, buy it.

Potassium dichromate is available from companies that distribute photographic chemicals.  Cheap too.

 
 
 
 
    Chromic
(Hive Addict)
04-24-02 00:46
No 300568
      Agreed  Bookmark   

Don't bother making your reagents... purchase them! There's nothing suspicious about purchasing a small to medium amount of dichromate.
 
 
 
 
    Elementary
(Hive Addict)
04-24-02 01:45
No 300580
      Also available...  Bookmark   

From wood finishing/french polishing suppliers. Used as a water based stain, called Bichromate of Potash.

Nobodys home
 
 
 
 
    rookee
(Stranger)
04-24-02 10:50
No 300744
      use potassium-Cr2 instead of sodium-Cr2???  Bookmark   

but can SWIM use potassium dichromat in the synthesis of copper(II)chromite instead of sodium dichromat? cool
 
 
 
 
    MTM
(Hive Bee)
04-24-02 12:51
No 300761
      aquisition of dichromate  Bookmark   

>Don't bother making your reagents... purchase them!
In some countries dichromate is watched because itīs toxic. Thatīs why you need a permission to buy it. I guess rookee lives in such a country and I fear thatīs why he/she is definitely not able to get it in a store.

M T M
 
 
 
 
    Belial
(Stranger)
04-24-02 13:15
No 300762
      Did you read anything about this?  Bookmark   

Rookee Did you read anything about this?
perhaps 248449 where placebo states:

"BTW, SWIM used Copper Nitrate and sodium chromate for the catalyst, and due to lack of supply, SWIM also tried Pottasium chromate with positive results."
 
 
 
 
    rookee
(Stranger)
04-24-02 21:25
No 300867
      SWIM is from germany, where nearly everything is ...  Bookmark   

SWIM is from germany, where nearly everything is watched and controlled... mad
so he has to synthesise almost anything.
rookee
 
 
 
 
    psychokitty
(Her Majesty, Stoni's Kitty)
04-25-02 06:36
No 301107
      Germany?  Bookmark   

How the hell do you guys learn to speak english?  Is that a required course over there?  (BTW, that is good, not bad).
 
 
 
 
    hest
(Hive Bee)
04-25-02 11:47
No 301195
      English  Bookmark   

Yes it is.
Most lit. are written in English or German. I'm from a country where we are only a few mill. people. Gues how much advanced chem. lit there is written on my birth language (and that's why the spelling somtimes is a bit 'strange' )
laugh
 
 
 
 
    rookee
(Stranger)
04-25-02 22:52
No 301333
      yeah, here you have to learn english in ...  Bookmark   

yeah, here you have to learn english in elementary school, when your are 10 or 11 years old.
english is not that hard to learn! but french is a big bite in the ass! blush
 
 
 
 
    MTM
(Hive Bee)
04-26-02 15:42
No 301634
      english vs french  Bookmark   

>english is not that hard to learn! but french is a big bite in the ass!

how true!

M T M
 
 
 
 
    Richy
(Stranger)
04-18-03 09:09
No 427753
      word  Bookmark   

yes, agreed there. my french teacher may have as well said that line from the alien on the simpsons> "in order for you to pronounce it correctly, i would have to, erm, rip out your tongue"

Fat chicks think they're hot, hot chicks think they're fat. What the fuck is up with that?
 
 
 
 
    ylid
(Stranger)
04-18-03 20:21
No 427871
      Dye mordant  Bookmark   

Potassium chromate is available in some countries from specialist art and craft suppliers as a dye mordant.

Who do you believe, me or your own eyes?
 
 
 
 
    Richy
(Stranger)
04-21-03 10:15
No 428334
      acetaldehyde  Bookmark   

for the acetaldehyde synth can this potassium dichromate substitute the sodium

Fat chicks think they're hot, hot chicks think they're fat. What the fuck is up with that?
 
 
 
 
    ylid
(Newbee)
04-21-03 11:50
No 428339
      K2Cr207 substitution  Bookmark   

The dichromate ion is the bit that does the oxidising, so I think the only chemical difference between the Na+ and K+ salts is their solubility. K2Cr2O7 is less soluble, especially in cold water. Na2Cr2O7 is hydroscopic, so it's hard to weigh out exact amounts. For this reason K2Cr2O7 is preferred for volumetric analysis.

Who do you believe, me or your own eyes?