freedomwm - 20-12-2004 at 00:24
Now I have a question to ask all of you for help. I want to mix three kinds of chemicals equally. Then the three kinds of chemicals are partical in
shape . So I want to ask how much the diameter of the particle is. Then in this diameter I can mix these particals equally.
What are you talking about???
Joeychemist - 20-12-2004 at 00:40
Do you mean you want to know how to calculate the volume and density of these 3 different chemicals so you can mix them in equal proportions, or may
be something along those lines???Because all I can understand from you're post is something about mixing three different chemicals together, then
after that it seems like you’re speaking nonsense
[Edited on 20-12-2004 by Joeychemist]
about the particle
freedomwm - 20-12-2004 at 01:42
sorry , I haven't express my mean clearly.
I want to mix the three chemicals uniformily. Then the diametre of the three chemicals should reach small enough. So I ask you the question . what is
the diameter should the particle ? Then I ask you the diameter . ok? thank you for your advice.
HNO3 - 20-12-2004 at 16:44
What chems are you mixing? What reaction is this for?
about the particle
freedomwm - 20-12-2004 at 17:44
first ,thank you for help!
There's none reaction between the three chemicals . One of the three is sodium hydroxide. the other one is EDTA4Na.2H2O. and the last one is
sodium grape sugar.
unionised - 21-12-2004 at 10:23
IIRC grape sugar (glucose) decomposes in strong alkali to give carbon monoxide.
I realise that this has nothing to do with the question, but it might stop you gassing yourself.
about the particle
freedomwm - 21-12-2004 at 18:42
I have to explain the whole thing . One of the three is sodium hydroxide , the other one is EDTA4Na, and the last one is sodium gluconate .Three of
them are sodium salt . Three chemicals in my hand are all powder or small crystal. So I want to mix them together equally . In my opinion ,there is
none reaction between them. But if there is some reaction between them(if you know),please tell me . Thank you.
Then whether I have to make the powder and the crystal small enough to mix the equally.
HNO3 - 21-12-2004 at 20:26
"mix them together equally"
Equal weight?
Equal moles?
Equal particle size?
Please pardon my confusion. 
PS Its 'no' not 'none' as in There is no reaction between them.
about the particle
freedomwm - 21-12-2004 at 21:22
I am so sorry . "mix them together equally" mean when taking any part and any quantity of the mixture , I can achieve them at the percent
I mix them at the beginning.
and there is no reaction between them.
???
Joeychemist - 21-12-2004 at 21:50
Nope, still don’t understand you man. Just flat out say one of the following three then we’ll go from there. Ok. You want to mix them together
equally by;
Equal weight?
Equal moles?
Equal particle size?
HNO3 - 22-12-2004 at 09:56
So you want it to be a homogenous mixture? You don't care about weight, moles, particle size, etc?
Oxydro - 22-12-2004 at 11:58
What I take from this is that he wants to know how small he has to grind his chemicals, in order to ensure that that any sample he takes from the
mixture will have the same composition. ie, how small do they have to be to make the mixture homogenous.
If so, it is an impossible question to answer. If you take one particle out of the mix, then that one particle can not be all of the compounds, so it
will not be the same as every other particle. Basically you need to know the minimum size of the sample, and how homogenous it has to be.
And even then, there is a chance that after you mix it, even for days, that it will be nowhere close to mixed. It is theoretically possible for you to
end up with all the bits of compound A to end up in the left top corner of your container . So, there is a probability aspect to it too.
Given all that, if you told me all the information, I would have no idea how to find an answer .
about the particle
freedomwm - 22-12-2004 at 17:41
thank you all for your help
,
The sample I take from the mixture is of course more than thousands of particles . So that I can gain the mixture consist of the characters of the
three chemicals .
about the particle
freedomwm - 22-12-2004 at 17:45
Yes , I don't care about the weight ,the moles, particle size.
The_Tsar_Bomba - 22-12-2004 at 17:52
Man, Just clearly tell use what your doing and maybe we can help!
Maybe???
Joeychemist - 22-12-2004 at 18:09
Ok, I think I might know what you’re saying now,But lets make sure, correct me if I’m wrong.
You want to mix three powder chemicals together as equally distributed in the mix as possible.(as close to a homogenous mixture as possible).The mix
will of course still be an heterogeneous mix but you just want to mix these powders with almost every particle evenly spaced from the others?
We are all try to help you but you really need to clean up you're english.
cyclonite4 - 23-12-2004 at 04:03
My take on it is that he wants to know how small to make each particle so they mix as evenly as possible, forming the closest to a homogenous mixture
as he can.
I'm just curious... whats the mixture for?
EDIT: oops, i just realized Oxydro said roughly the same thing... i was skimming through this too fast... my mistake
[Edited on 23-12-2004 by cyclonite4]
DrP - 19-12-2005 at 08:47
Hmm - sorry to drag this up as it's an old thread, but I found it amusing reading...
Anyway - (if it's still relavent) - What about just grinding it all up in a mortar and pestle?
[Edited on 19-12-2005 by DrP]
neutrino - 19-12-2005 at 14:31
Ball milling is used for gunpowder manufacture. You start with three separate powders, mill for a while, and end up with a very finely mixed powder. I
will admit that this does have something to do with the porous structure of the charcoal used, but it should work for this nonetheless.
[Edited on 19-12-2005 by neutrino]
woelen - 20-12-2005 at 10:51
I don't expect that will work well if one of the ingredients is NaOH. That is VERY hygroscopic and soon you'll have a nasty and sticky mess.
neutrino - 20-12-2005 at 14:33
Many ball mills are air and water-tight. I suppose this is to prevent dusts from flying around, igniting, and flashing back to the mill.
If the cylinder is sealed in an inert atmosphere, you shouldn't have much of a problem.