morsagh
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Pentanoic acid extraction
I prepared pentanoic acid by oxidation of amyl alcohol by KMnO4, but now i have 150ml of solution of KOH and pottasium salt of pentanoic acid. Is
there any way hot to extract pentanoic acid from this solution without boiling out most of water?
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Metacelsus
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Pentanoic acid logP for water:diethyl ether is 1.24 (according to my table), so it should be possible to extract after acidification. I would expect
similar values for other solvents. You'll probably want to extract repeatedly (at least twice) to ensure good recovery.
What's wrong with boiling off most of the water, so you can use a smaller amount of solvent to extract? Pentanoate won't decompose if you do that.
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PHILOU Zrealone
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Add an excess of HCl or H2SO4 and collect the oily layer on top.
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)
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DraconicAcid
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Or very concentrated sodium hydrogen sulphate.
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.
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morsagh
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It will take very long to boil of that much water
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JJay
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It won't take long to boil off 150 mL of water... I have boiled off 15000 mL of water several times in the past few weeks. That takes 100x as long.
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