CrossxD
Hazard to Self
Posts: 66
Registered: 6-7-2015
Member Is Offline
Mood: stainless
|
|
is it trick?
I can't solve this.......
I have potassium chloride and citric acid and I need make potassium citrate...... and I dont wanna use electrochemistry
some trick that would work with all soluble salts of strong acid to make salts of weak acids :/
can someone help?
Thank you, Cross
|
|
|
Neme
Hazard to Self
Posts: 86
Registered: 28-5-2016
Location: Czech republic
Member Is Offline
Mood: No Mood
|
|
Get potassium hydroxide. Easier than making it from chloride.
|
|
|
CrossxD
Hazard to Self
Posts: 66
Registered: 6-7-2015
Member Is Offline
Mood: stainless
|
|
I know but I have sooooooo much of potassium chloride and beside this I dont have any use for this....... I already have potassium nitrate 
|
|
|
stoichiometric_steve
National Hazard
Posts: 827
Registered: 14-12-2005
Member Is Offline
Mood: satyric
|
|
there is no trick. you're SOL.
|
|
|
BromicAcid
International Hazard
Posts: 3253
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
Add citric acid and potassium chloride to water and dissolve. Boil to drive off the hydrogen chloride.
KCl + C6H8O7 ----> HCl + C6H7O7K
Test for reaction completion by looking for silver with silver nitrate. Keep a log like the one below:
Day 1 : Still lots of chloride
Day 2: Still lots of chloride
Day 3: Am I even making any progress
Day 4: Getting better
Day 5: Yes, better
Day 6: I've been fooling myself, still lots of chloride
It could work in theory but in practice it might be a bear.
|
|
|
DraconicAcid
International Hazard
Posts: 4357
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
Citric acid is way too weak for BromicAcid's reaction to work. You'd be far better off neutralizing the acid with baking soda, and then finding a
solvent in which potassium citrate is less soluble than sodium citrate.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
Electrolyse your KCl into a divided cell allowing the Cl2 to escape (or recollect it into basic water NaOH, Na2CO3 or NaHCO3 to form hypochlorites
into the cold and chlorates when into warm conditions)...you will get KOH.
Or warm to red heat some dry KCl with Mg ribons or Al powder...and get some metallic K (beware dangerous chemistry and chemical (explodes when exposed
to water)).
Alternatively play with KCl, KMnO4 and exces acetic acid...will generate clouds of Cl2 (beware toxic) , Mn (II) acetate and K acetate...you need a way
to take the Mn(2+) away...via precipitation?
React the K acetate with citric acid and boil off the acetic acid.
[Edited on 13-2-2017 by PHILOU Zrealone]
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
|
|
|
BromicAcid
International Hazard
Posts: 3253
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
Quote: Originally posted by DraconicAcid  | | Citric acid is way too weak for BromicAcid's reaction to work. You'd be far better off neutralizing the acid with baking soda, and then finding a
solvent in which potassium citrate is less soluble than sodium citrate. |
I think that was my entire point. Most reactions will happen to 'some' extent, and in this case I would invoke Le Châtelier's principle, driving
forward the reaction by removing HCl. But even so, the point of my post, was that it may never go far enough to even make a difference.
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
You could first form silver citrate, which will react with potassium chloride in a citric acid solution to produce insoluble silver chloride. Then you
could remove the water under vacuum and extract the citric acid with ethanol. Then you could recrystallize to purify.
Of course, doing this would require using expensive silver compounds which are unstable and hard to handle, not to mention ethanol and a lot of work,
so it probably defeats the purpose of using potassium chloride to prepare potassium citrate. But it is possible.
|
|
|
DraconicAcid
International Hazard
Posts: 4357
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
Sorry- I had just skimmed your post.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
CrossxD
Hazard to Self
Posts: 66
Registered: 6-7-2015
Member Is Offline
Mood: stainless
|
|
as PHILOU Zrealone said I can oxidise chloride to chlorine, but parmangane is quite expensive , so can I use hydrogen peroxide and citric acid to
make potassiu citrate and chlorine or are there any other oxidants which are posible to use??
|
|
|
TheNerdyFarmer
Hazard to Others
Posts: 131
Registered: 30-9-2016
Member Is Offline
Mood: No Mood
|
|
If you want to find an extra use for potassium chloride, you could mix it with sodium chlorate to make potassium chlorate.
NaClO3+KCl => KClO3+NaCl
Pretty good chemical to have if you want to experiment with oxidisers.
[Edited on 13-2-2017 by TheNerdyFarmer]
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
