1. Solubility is inversely related to the general stability of a substance in water; substances with low solubility are generally more stable in aqueous environments.
2. The characteristic property of the fractions is their differing solubility in water, which allows for separation based on how readily each dissolves.
3. Fraction C would be separated from a mixture by eliminating the top layer (the liquid) because it is insoluble and remains as a solid residue after the soluble components dissolve.
4. If the entire mixture were placed in methanol (a polar solvent), then the liquid phase would contain Fractions A and B (which are soluble in polar solvents), while Fraction C would remain as a solid residue at the bottom.
5. Fraction C behaved as an insoluble solid during the separation process, remaining undissolved and forming a distinct layer at the bottom of the container.
6. Chromatography separates components based on differential migration through a medium; in paper chromatography, components travel at different rates depending on their solubility in the solvent and affinity for the paper. Differences arise due to varying intermolecular forces and polarity between the components and the mobile/stationary phases.
7. When fractions are put together again, all properties revert to those of the original homogeneous mixture because the individual components retain their chemical identities and recombine without altering their fundamental properties.
Parent Tip: Review the logic above to help your child master the concept of separation techniques worksheet.
