Immiscible liquids.

Non-polar octane molecules are immiscible in a polar solvent such as water.

In addition to playing a role in determining physical properties such as boiling point, the electronegativity differences within a compound determine its solubility properties. The electronegativity difference among bonded atoms determines whether a bond is polar or nonpolar. The polarity of a molecule's chemical bonds determines the nature of the its attraction to other molecules.

In other words, whether a molecule contains polar or nonpolar bonds determines the kinds of intermolecular force it can participate in, whether simply Van der Waals forces (also called London dispersion forces) for nonpolar molecules, dipole-dipole interaction, or hydrogen bonding.

As we discussed earlier, the nature of intermolecular force plays a crucial role in determining physical properties such as boiling point. With boiling point, we are concerned with the intermolecular attraction between a molecule and other molecules of its own type.

With solution chemistry, we are also concerned with the intermolecular attraction between the molecule and the molecules of a potential solvent. The kind of intermolecular force relationships that a substance will engage in plays a crucial role in determing the solubility properties of the substance. For the solution process, the rule is 'like dissolves like'. Polar molecules dissolve in polar solvents while nonpolar molecules dissolve in nonpolar solvents.












The WikiPremed MCAT Course is a comprehensive course in the undergraduate level general sciences. Undergraduate level physics, chemistry, organic chemistry and biology are presented by this course as a unified whole within a spiraling curriculum. Please read our policies on Privacy and Shipping & Returns.  Contact Us. MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the WikiPremed Course. WikiPremed offers the customers of our publications or our teaching services no guarantees regarding eventual performance on the MCAT.


Creative Commons License
WikiPremed is a trademark of Wisebridge Learning Systems LLC. The work of WikiPremed is published under a Creative Commons Attribution NonCommercial ShareAlike License. There are elements of work here, such as a subset of the images in the archive from WikiPedia, that originated as GNU General Public License works, so take care to follow the unique stipulations of that license in printed reproductions.