Gigtator
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Solvent Solubility Question
Hello everybody,
a quick question just came to my mind:
- So let us assume we have water as a polar solvent.
- It is mixed with isopropyl alcohol which has polar and nonpolar characteristics.
- If finally a non-polar & water insoluble solvent such as dichlormethane is added what will happen?
Will the three of them mix up forming a single layer, or is the dichlormethane pulling the alcohol away from the water so that a polar and a non-polar
layer will form?
Thank you in advance for your answer.
Best Regards
Gigtator
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unionised
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It depends.
If there is lots of IPA then it will all mix.
If it's mainly DCM and water then there will be two layers.
And, just to make it a little more complex, the miscibility is also temperature dependent.
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DraconicAcid
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If you have benzene, ethanol and water, you get this phase diagram:
Sadly, it doesn't have a scale, but it seems that it it's more than 40% ethanol, you will form one phase. If you have a little less than that,
you'll have two phases- one that's mostly benzene and water, and one that's mostly alcohol and water. If you only have a little ethanol, you'll have
one phase that's ethanol and benzene, and the other that's mostly water.
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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