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Thread: solubility of a solvent

  1. #1 solubility of a solvent 
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    How do I determine how much of a substance a solvent can dissolve? is there an easy way to do this?


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  3. #2 Re: solubility of a solvent 
    gc
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    Quote Originally Posted by Arcane_Mathematician
    How do I determine how much of a substance a solvent can dissolve? is there an easy way to do this?
    Do you have access to the solvent and solute? A very easy way would be to add excess solute to the solvent and let it sit for a while to reach equilibrium, then filter it into a flask, evaporate the solvent and measure the mass of the previously dissolved solute.


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  4. #3  
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    hmmm.... I was looking for a method that didn't involve trial and error measurement, but if that's what I need to do, will do.
    Wise men speak because they have something to say; Fools, because they have to say something.
    -Plato

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  5. #4  
    gc
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    Quote Originally Posted by Arcane_Mathematician
    hmmm.... I was looking for a method that didn't involve trial and error measurement, but if that's what I need to do, will do.
    Yeah, the only way to know for sure is to test it, which means either doing it yourself or finding out if anyone else has tried it.
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  6. #5  
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    depends on what the solute and the solvent are, solubility constants are avilable for many substaces in water for example.
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  7. #6  
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    Hanson Solubility Parameters (HSP) may help you, but this theory also has defects. For instance, according to this theory, polyethylene glycol (PEG) should be dissolved in Hexane, but in real case it is not. This may be explained that the polarity of PEG is incompatible to non-polar Hexane.

    So, you can refer to HSP to have try.

    Thanks
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