chemoleo
Biochemicus Energeticus
Posts: 3005
Registered: 23-7-2003
Location: England Germany
Member Is Offline
Mood: crystalline
|
|
(In)Solubilities of Alkali Salts
Ok, for numerous purposes I wondered what everyone knew about the most soluble and especially most insoluble alkali salts (in water, or even EtOH).
In terms of insolubility, the only ones I can think of that are sparingly soluble is KClO3/4.
Another one that has mediocre solubility is Ammonium oxalate, at around 5g/100 ml.
Does anyone know more? I know there are a few more... but I thought it might be a good idea to have them all listed in a thread, because insoluble
alkalimetal salts are very useful for a LARGE number of separations (equally earth alkali metal salts, such as barium sulphate etc).
Bring on the solubility tables! 
PS Do include ammonium salts!
[Edited on 23-12-2003 by chemoleo]
Never Stop to Begin, and Never Begin to Stop...
Tolerance is good. But not with the intolerant! (Wilhelm Busch)
|
|
|
BromicAcid
International Hazard
Posts: 3227
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
For the most soluble I believe that it is either lithium chlorate (313.5 g/100ml cold water) or lithium perchlorate although I don't have the
solublility data for the latter. I believe sterate salts are almost insoluble as are the bismuthate salts although those are impractical.
|
|
|
unionised
International Hazard
Posts: 5103
Registered: 1-11-2003
Location: UK
Member Is Offline
Mood: No Mood
|
|
Sodium forms a sparingly soluble mixed salt with zinc and uranyl acetate.
Alkali metal stearates are soluble; the alkaline earth stearates aren't.
|
|
|
KABOOOM(pyrojustforfun)
Hazard to Others
Posts: 254
Registered: 12-10-2002
Location: Iran (pseudoislamic dictatorship of)
Member Is Offline
Mood: exuviating!
|
|
K<sub>sp</sub> (from the annex in Mortimer's "chemistry, 6th ed"
NaHCO<sub>3</sub> 0.0012, KClO<sub>4</sub> 0.0089
I need to know solublity of NaOH in EtOH (quantitative of course!) can any one help? or even better a solublity curve
|
|
|
BromicAcid
International Hazard
Posts: 3227
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
KABOOOM, the only thing I could find on the solubility of sodium hydroxide in ethanol was that a saturated solution at 25 C contains 13.9 g of NaOH
per 100 ml EtOH.
Sodium Iodate only has a solubility of 2.5g/100 ml in cold water and as for my above comment on the sterates I was specifically thinking of lithium
sterate and foolishly assumed that it extended to all of them, the solubility of lithum sterate is .010g/100ml in cold water, that just automatically
popped into my head because they use it extensively in greases.
|
|
|
unionised
International Hazard
Posts: 5103
Registered: 1-11-2003
Location: UK
Member Is Offline
Mood: No Mood
|
|
CRC handbook gives the solubillity of NaHCO3 as 6.9% at 0C. Fairly low as sodium salts go.
(I'd forgotten about Li stearate. Li is always awkward.)
|
|
|
blip
Hazard to Others
Posts: 133
Registered: 16-3-2003
Member Is Offline
Mood: absorbed
|
|
<a href ="http://chemdat.merck.de/cdrl/services/labtools/en/table_solinl.html"
target="_blank">Li<sub>2</sub>CO<sub>3</sub> is 1.3g/100mL H<sub>2</sub>O @ 20°C.</a>
Indeed lithium salts are weird.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
