Re: Potassium Oxalate

I separated the clear potassium oxalate solution
from the undissolved stuff at the bottom and put
it aside. I then added about 100 gs of water to
the undissolved junk and stirred. But it still
did not dissolve, so I then added some sodium
carbonate (by mistake since I meant to add
potassium carbonate). There was a lot of fizzing
and when it stopped everything was in solution.
But what do I have? Sodium Oxalate, or a mixture
of sodium and potassium oxalate?

Sandy

>I used the anhydrous variety of potassium carbonate.
>
>Thanks for the information about concentration.
>I will add some water to the solution and see if
>the stuff at at bottom dissolves.
>
>Sandy
>
>
>
>>Sandy,
>>What form of potassium carbonate did you use? If it is anhydrous, then you
>>are about right, you can still add another few grams of potassium
>>carbonate, say 10 grams. If you used hydrated potassium carbonate, then
>>your proportions are off. By my estimation your solution is about 1.0M. I
>>don't find any benefits using solutions more concentrated then 0.9M (im my
>>practice, pritning Pd), so you can add some water to it (50-100cc).
>>You should not have any undissolved stuff.
>>Marek Matusz
>>
>>> I mixed up a solution of potassium oxalate
>>> following directions provided by Nzé Christian. I
>>> added 130 gs of oxalic acid to 500 ml of water,
>>> mixed until dissolved, and then added 100 gs of
>>> potassium carbonate, and finished by adding
>>> another 15 gs of potassium carbonate, and finally
>>> I topped off the solution to one liter. Distilled
>>> water was used.
>>>
>>> The solution works fine for printing but there is
>>> still some junk at the bottom of the container
>>> that has not dissolved. What did I do wrong? Do I
>>> need to add more water, increase the temperature
>>> of the mix, or other?
>>>
>>> Sandy King
Received on Wed Sep 15 12:49:36 2004