Partition Coefficients: What Do They Tell Us?

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SUMMARY

The partition coefficient is a critical measure that indicates the solubility of a compound in two immiscible solvents. In the case of Benzoic acid (BA), a partition coefficient of approximately 0.25 suggests that BA is more soluble in water than in methylene chloride, despite common references indicating its higher solubility in methylene chloride. This discrepancy arises from the need to consider the volumes of each solvent used in the experiment, which were not provided. Understanding the relationship between partition coefficients and solubility requires careful consideration of both the solute and solvent properties.

PREREQUISITES
  • Understanding of partition coefficients and their significance in solubility
  • Basic knowledge of solubility principles in chemistry
  • Familiarity with Benzoic acid and its properties
  • Experience with laboratory techniques such as liquid-liquid extraction
NEXT STEPS
  • Research the concept of partition coefficients in organic chemistry
  • Learn about the solubility of Benzoic acid in various solvents
  • Study intensive versus extensive properties in chemistry
  • Explore methods for calculating partition coefficients in laboratory settings
USEFUL FOR

Chemistry students, laboratory technicians, and researchers involved in solubility studies and organic compound analysis will benefit from this discussion.

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Homework Statement


What exactly does partition coefficient tell us? if I have a low partition coefficient, does that mean its less soluble in that compound?


Homework Equations





The Attempt at a Solution



I had .0555g Benzoic acid mixed with water and methylene chloride. It formed two layers of which BA (Benzoic acid) is dissolved in water or methylene chloride. I pippeted out the methylene chloride and heated it, and there is .011g of BA in the vial. I got a partition coefficient of around .25. Does this mean that BA is more soluable in water since .0445g of BA was still in water?

But this doesn't make sense because when I looked it up, it says BA is more soluble in methylene chloride.
 
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I guess you are confusing intensive and extensive properties. You have not mentioned volumes - what they were?
 

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